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Universiteit Utrecht
1.
André, B.J.
Improving cold tolerance in tomato plants using natural variation.
Degree: 2012, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/250525
► The demand for food and fuel is increasing due to the rising human population. Therefore are their new strategies needed to increase crop yield. Plants…
(more)
▼ The demand for food and fuel is increasing due to the rising human population. Therefore are their new strategies needed to increase crop yield. Plants suffer from low temperatures which leads to damage to fruit and plant growth. Even non freezing temperatures can have a dramatic effect on plant development. Better insight into
cold acclimation responses of plants will lead to better protection to low temperatures. One well examined process that is active during
cold acclimation is the c-repeat-binding factor (CBF) regulon. This CBF regulon regulates multiple genes that in turn are responsible for a
cold acclimation response. However, not all reactions of the plant are explained by the CBF regulon, therefore more pathways need to be involved.
This proposal will search for other pathways that are involved in
cold acclimation. This will be done by analyzing tomato varieties that grow on high altitudes with 1) micro array studies and 2) QTL mapping. Identified candidate genes will be studied in function by transforming Arabidopsis plants. It will also be tested if these candidate genes are connected to the CBF regulon or if they regulated the CBF regulon. Heretofore CBF knockout mutants of Arabidopsis will be used and candidate genes will be introduced. The newly identified related genes can be used to improve crop performance even further and keep up with human demand.
Advisors/Committee Members: Pierik, Dr. R..
Subjects/Keywords: Cold tolerance; tomato; natural variation
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APA (6th Edition):
André, B. J. (2012). Improving cold tolerance in tomato plants using natural variation. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/250525
Chicago Manual of Style (16th Edition):
André, B J. “Improving cold tolerance in tomato plants using natural variation.” 2012. Masters Thesis, Universiteit Utrecht. Accessed February 28, 2021.
http://dspace.library.uu.nl:8080/handle/1874/250525.
MLA Handbook (7th Edition):
André, B J. “Improving cold tolerance in tomato plants using natural variation.” 2012. Web. 28 Feb 2021.
Vancouver:
André BJ. Improving cold tolerance in tomato plants using natural variation. [Internet] [Masters thesis]. Universiteit Utrecht; 2012. [cited 2021 Feb 28].
Available from: http://dspace.library.uu.nl:8080/handle/1874/250525.
Council of Science Editors:
André BJ. Improving cold tolerance in tomato plants using natural variation. [Masters Thesis]. Universiteit Utrecht; 2012. Available from: http://dspace.library.uu.nl:8080/handle/1874/250525

University of Minnesota
2.
Tussey, Dylan.
The effects of feeding and overwintering conditions on emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) energy reserves and flight performance.
Degree: MS, Entomology, 2017, University of Minnesota
URL: http://hdl.handle.net/11299/190618
► The emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) is an invasive beetle from Asia that has been confirmed in 30 states as of July…
(more)
▼ The emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) is an invasive beetle from Asia that has been confirmed in 30 states as of July 2017. The spread of A. planipennis has been markedly slower in Minnesota than in other states. Cold winter temperatures are thought to be the primary factor for the slower spread. The goals of this study were to determine the role of adult feeding on A. planipennis energy reserves and flight capacity, as well as to elucidate any sub-lethal effects of winter conditions on A. planipennis flight capacity. In 2015 and 2016, adult A. planipennis were reared from infested green ash logs collected in Hennepin and Ramsey Counties, MN. A separate experiment was conducted by collecting infested logs from St Paul, MN and stored in two locations during the winter of 2015-2016. Grand Rapids, MN, and St Paul, MN, to determine how winter conditions affect A. planipennis energy reserves and flight capacity. Adults were individually placed in cages and provided with fresh, lab-grown shamel ash (Fraxinus uhdei Wenzig) leaves on which to feed for 0-20 days before being flash frozen or flown on a custom flight mill for 24 hours under constant light. Beetles were subjected to nutrient analysis using either petroleum ether or colorimetric assays. Feeding treatments were compared for weight and lipid gain, flight velocity and total distance flown.
Subjects/Keywords: Agrilus planipennis; cold tolerance; flight
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APA ·
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APA (6th Edition):
Tussey, D. (2017). The effects of feeding and overwintering conditions on emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) energy reserves and flight performance. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/190618
Chicago Manual of Style (16th Edition):
Tussey, Dylan. “The effects of feeding and overwintering conditions on emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) energy reserves and flight performance.” 2017. Masters Thesis, University of Minnesota. Accessed February 28, 2021.
http://hdl.handle.net/11299/190618.
MLA Handbook (7th Edition):
Tussey, Dylan. “The effects of feeding and overwintering conditions on emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) energy reserves and flight performance.” 2017. Web. 28 Feb 2021.
Vancouver:
Tussey D. The effects of feeding and overwintering conditions on emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) energy reserves and flight performance. [Internet] [Masters thesis]. University of Minnesota; 2017. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/11299/190618.
Council of Science Editors:
Tussey D. The effects of feeding and overwintering conditions on emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) energy reserves and flight performance. [Masters Thesis]. University of Minnesota; 2017. Available from: http://hdl.handle.net/11299/190618

University of Minnesota
3.
Hanson, Anthony Arden.
Cold tolerance of emerald ash borer parasitoids: Oobius
agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili
Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang
(Hymenoptera: Eulophidae).
Degree: MS, Entomology, 2013, University of Minnesota
URL: http://purl.umn.edu/156697
► University of Minnesota M.S. thesis. May 2013. Major: Entomology. Advisor: Robert C. Venette. 1 computer file (PDF); vi, 96 pages, appendix 1.
Three Chinese parasitoids…
(more)
▼ University of Minnesota M.S. thesis. May 2013.
Major: Entomology. Advisor: Robert C. Venette. 1 computer file
(PDF); vi, 96 pages, appendix 1.
Three Chinese parasitoids are currently being
released in North America to control emerald ash borer,
Agrilus planipennis Fairmaire
(Coleoptera: Buprestidae): Spathius
agrili Yang (Hymenoptera: Braconidae),
Tetrastichus planipennisi Yang
(Hymenoptera: Eulophidae), and Oobius
agrili Zhang and Huang (Hymenoptera: Encyrtidae).
The degree to which cold climates may limit their potential
distributions in North America is unknown, especially in areas like
Minnesota that experience a wide range of winter temperatures. To
assess parasitoid cold tolerance, I developed a new thermocouple
design to reliably measure the temperature of small insects, such
as parasitoids. I then exposed the parasitoids to temperatures from
0 to -35°C in the lab to assess their cold tolerance.
NAPPFAST software was used to forecast overwintering mortality of
S. agrili and T.
planipennisi in North America. These forecasts of
overwintering mortality will aid researchers and policy makers in
deciding where the parasitoids should be released.
Advisors/Committee Members: Robert C. Venette.
Subjects/Keywords: Cold tolerance; Emerald ash borer; Parasitoid; Thermocouple
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hanson, A. A. (2013). Cold tolerance of emerald ash borer parasitoids: Oobius
agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili
Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang
(Hymenoptera: Eulophidae). (Masters Thesis). University of Minnesota. Retrieved from http://purl.umn.edu/156697
Chicago Manual of Style (16th Edition):
Hanson, Anthony Arden. “Cold tolerance of emerald ash borer parasitoids: Oobius
agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili
Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang
(Hymenoptera: Eulophidae).” 2013. Masters Thesis, University of Minnesota. Accessed February 28, 2021.
http://purl.umn.edu/156697.
MLA Handbook (7th Edition):
Hanson, Anthony Arden. “Cold tolerance of emerald ash borer parasitoids: Oobius
agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili
Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang
(Hymenoptera: Eulophidae).” 2013. Web. 28 Feb 2021.
Vancouver:
Hanson AA. Cold tolerance of emerald ash borer parasitoids: Oobius
agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili
Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang
(Hymenoptera: Eulophidae). [Internet] [Masters thesis]. University of Minnesota; 2013. [cited 2021 Feb 28].
Available from: http://purl.umn.edu/156697.
Council of Science Editors:
Hanson AA. Cold tolerance of emerald ash borer parasitoids: Oobius
agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili
Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang
(Hymenoptera: Eulophidae). [Masters Thesis]. University of Minnesota; 2013. Available from: http://purl.umn.edu/156697

University of Ottawa
4.
Tremblay, Philippe.
The Role of Cold Tolerance in the Geographic Distribution of the Giant Swallowtail Butterfly (Papilio cresphontes)
.
Degree: 2020, University of Ottawa
URL: http://hdl.handle.net/10393/40207
► Climate change is a well-known factor driving species range shifts. These shifts are often attributed to the relaxation of harsher climates at the northern range…
(more)
▼ Climate change is a well-known factor driving species range shifts. These shifts are often attributed to the relaxation of harsher climates at the northern range limit. Specifically, lack of cold tolerance as a constraint on range expansion at higher latitudes is one hypothesis. However, few, if any, studies have tested this hypothesis during a critical season: fall, when organisms are subjected to sporadic low temperature exposure but may not have become cold tolerant yet. In this study, I investigated the impact of low temperature on the larvae of the Giant swallowtail butterfly, Papilio cresphontes, at its northern range edge by integrating physiological experiments and species distribution modelling. First, the cold hardiness of the larvae was tested in a laboratory by determining their supercooling point, chill coma temperature and survival at three low temperatures. I found that the supercooling point was -6.6°C, that larvae use a freeze avoidant strategy, and that larvae enter a chill coma at 2.4°C. I also found that exposure to -2°C did not lead to a high rate of mortality, but that larval survival was impeded by temperatures below the SCP with temperatures below SCP (-8°C) produced high mortality (10-12% survival). Second, to determine the importance of low temperatures at a broad scale, I compared species distribution models of P. cresphontes based only on environmental data derived from other sources to models that also included the physiologically-derived parameters I generated experimentally. The modelling revealed that growing degree days and precipitation best predicted the distribution of P. cresphontes. The cold tolerance variables did not explain much variation in habitat suitability of P. cresphontes distribution. As such, the modelling results were consistent with the experimental results: low temperatures in the fall are unlikely to limit the distribution of P. cresphontes. Further investigation into the ecological relevance of the physiological thresholds determined here will improve our understanding of range expansion of P. cresphontes due to climate change. This study demonstrates that a combination of approaches provides a strong test of hypotheses related to the factors that limit species distributions.
Subjects/Keywords: Cold tolerance;
Species distribution;
modeling;
Butterfly
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tremblay, P. (2020). The Role of Cold Tolerance in the Geographic Distribution of the Giant Swallowtail Butterfly (Papilio cresphontes)
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/40207
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tremblay, Philippe. “The Role of Cold Tolerance in the Geographic Distribution of the Giant Swallowtail Butterfly (Papilio cresphontes)
.” 2020. Thesis, University of Ottawa. Accessed February 28, 2021.
http://hdl.handle.net/10393/40207.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tremblay, Philippe. “The Role of Cold Tolerance in the Geographic Distribution of the Giant Swallowtail Butterfly (Papilio cresphontes)
.” 2020. Web. 28 Feb 2021.
Vancouver:
Tremblay P. The Role of Cold Tolerance in the Geographic Distribution of the Giant Swallowtail Butterfly (Papilio cresphontes)
. [Internet] [Thesis]. University of Ottawa; 2020. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/10393/40207.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tremblay P. The Role of Cold Tolerance in the Geographic Distribution of the Giant Swallowtail Butterfly (Papilio cresphontes)
. [Thesis]. University of Ottawa; 2020. Available from: http://hdl.handle.net/10393/40207
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Minnesota
5.
Hanson, Anthony Arden.
Cold tolerance of emerald ash borer parasitoids: Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae).
Degree: MS, Entomology, 2013, University of Minnesota
URL: http://purl.umn.edu/156697
► Three Chinese parasitoids are currently being released in North America to control emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae): Spathius agrili Yang (Hymenoptera: Braconidae),…
(more)
▼ Three Chinese parasitoids are currently being released in North America to control emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae): Spathius agrili Yang (Hymenoptera: Braconidae), Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae), and Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae). The degree to which cold climates may limit their potential distributions in North America is unknown, especially in areas like Minnesota that experience a wide range of winter temperatures. To assess parasitoid cold tolerance, I developed a new thermocouple design to reliably measure the temperature of small insects, such as parasitoids. I then exposed the parasitoids to temperatures from 0 to -35°C in the lab to assess their cold tolerance. NAPPFAST software was used to forecast overwintering mortality of S. agrili and T. planipennisi in North America. These forecasts of overwintering mortality will aid researchers and policy makers in deciding where the parasitoids should be released.
Subjects/Keywords: Cold tolerance; Emerald ash borer; Parasitoid; Thermocouple
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hanson, A. A. (2013). Cold tolerance of emerald ash borer parasitoids: Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae). (Masters Thesis). University of Minnesota. Retrieved from http://purl.umn.edu/156697
Chicago Manual of Style (16th Edition):
Hanson, Anthony Arden. “Cold tolerance of emerald ash borer parasitoids: Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae).” 2013. Masters Thesis, University of Minnesota. Accessed February 28, 2021.
http://purl.umn.edu/156697.
MLA Handbook (7th Edition):
Hanson, Anthony Arden. “Cold tolerance of emerald ash borer parasitoids: Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae).” 2013. Web. 28 Feb 2021.
Vancouver:
Hanson AA. Cold tolerance of emerald ash borer parasitoids: Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae). [Internet] [Masters thesis]. University of Minnesota; 2013. [cited 2021 Feb 28].
Available from: http://purl.umn.edu/156697.
Council of Science Editors:
Hanson AA. Cold tolerance of emerald ash borer parasitoids: Oobius agrili Zhang and Huang (Hymenoptera: Encyrtidae), Spathius agrili Yang (Hymenoptera: Braconidae), and Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae). [Masters Thesis]. University of Minnesota; 2013. Available from: http://purl.umn.edu/156697

Louisiana State University
6.
Russell, Alana D.
Cold Tolerance and Overwintering Physiology of the Salvinia Weevil (Cyrtobagous salviniae): Improving the Biological Control of Giant Salvinia in Temperate Louisiana.
Degree: MS, Entomology, 2017, Louisiana State University
URL: etd-04072017-131605
;
https://digitalcommons.lsu.edu/gradschool_theses/4421
► Cyrtobagous salviniae is widely used for biological control of Salvinia molesta. Despite success in tropical and subtropical regions, the effectiveness of C. salviniae on S.…
(more)
▼ Cyrtobagous salviniae is widely used for biological control of Salvinia molesta. Despite success in tropical and subtropical regions, the effectiveness of C. salviniae on S. molesta is inconsistent in temperate regions, indicating the need for a better understanding of the thermal biology of this agent. The objectives of this study were to compare cold tolerance of C. salviniae populations from the temperate native range and Louisiana, and characterize the overwintering physiology and population dynamics of C. salviniae in Louisiana.
Surveys of the Lower Paraná-Uruguay Delta resulted in the first record of C. salviniae in Uruguay, and revealed the most southern distribution of this species in Argentina and Uruguay. Survival at 0°C was 1.5-times greater, chill coma recovery time was 1.8-times faster, and SCP was 1.2-times lower in the Argentine population compared to the Louisiana population. These findings show that the Argentine provenance should be considered for managing S. molesta in temperate regions. Besides host range tests, cross breeding between the Louisiana and Argentine populations should be investigated to determine the life histories of any possible hybrid.
Laboratory assays demonstrated phenotypic plasticity in the cold tolerance of populations from central and southern Louisiana when acclimated to winter conditions. Survival at 0°C was 1.8- and 1.7-times greater, critical thermal minimum was 1.2- and 1.3-times lower, and chill coma recovery time was 2.7- and 1.5-times faster in the winter treatments compared to summer treatments, for both populations (central and south, respectively). Seasonal changes in reproductive status, fat body, and water content were evident from the field study, and are speculated to contribute to the overwintering success of adults at both sites. Adult and larval densities showed that populations were most vulnerable in the late winter/early spring, presumably when water temperatures and host plant quality have not yet recovered. Seasonal monitoring of the physiological status and population dynamics should be conducted to improve the timing of releases and predicting the success of S. molesta control. In conclusion, the management of S. molesta in northern Louisiana should incorporate releases of cold tolerant populations, and seasonal monitoring of physiology and population dynamics of C. salviniae.
Subjects/Keywords: biological control; cold tolerance; niche modeling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Russell, A. D. (2017). Cold Tolerance and Overwintering Physiology of the Salvinia Weevil (Cyrtobagous salviniae): Improving the Biological Control of Giant Salvinia in Temperate Louisiana. (Masters Thesis). Louisiana State University. Retrieved from etd-04072017-131605 ; https://digitalcommons.lsu.edu/gradschool_theses/4421
Chicago Manual of Style (16th Edition):
Russell, Alana D. “Cold Tolerance and Overwintering Physiology of the Salvinia Weevil (Cyrtobagous salviniae): Improving the Biological Control of Giant Salvinia in Temperate Louisiana.” 2017. Masters Thesis, Louisiana State University. Accessed February 28, 2021.
etd-04072017-131605 ; https://digitalcommons.lsu.edu/gradschool_theses/4421.
MLA Handbook (7th Edition):
Russell, Alana D. “Cold Tolerance and Overwintering Physiology of the Salvinia Weevil (Cyrtobagous salviniae): Improving the Biological Control of Giant Salvinia in Temperate Louisiana.” 2017. Web. 28 Feb 2021.
Vancouver:
Russell AD. Cold Tolerance and Overwintering Physiology of the Salvinia Weevil (Cyrtobagous salviniae): Improving the Biological Control of Giant Salvinia in Temperate Louisiana. [Internet] [Masters thesis]. Louisiana State University; 2017. [cited 2021 Feb 28].
Available from: etd-04072017-131605 ; https://digitalcommons.lsu.edu/gradschool_theses/4421.
Council of Science Editors:
Russell AD. Cold Tolerance and Overwintering Physiology of the Salvinia Weevil (Cyrtobagous salviniae): Improving the Biological Control of Giant Salvinia in Temperate Louisiana. [Masters Thesis]. Louisiana State University; 2017. Available from: etd-04072017-131605 ; https://digitalcommons.lsu.edu/gradschool_theses/4421

Louisiana State University
7.
Borjas Artica, Anna Hissahe.
Molecular Genetics of Cold Tolerance at Germination and Seedling Stages in Rice.
Degree: MS, Plant Sciences, 2017, Louisiana State University
URL: etd-04032017-150415
;
https://digitalcommons.lsu.edu/gradschool_theses/4444
► Low temperature stress is a major constraint for rice production in temperate and high altitude areas of the world. Delayed germination coupled with reduced seedling…
(more)
▼ Low temperature stress is a major constraint for rice production in temperate and high altitude areas of the world. Delayed germination coupled with reduced seedling vigor hinders crop establishment and crop growth resulting in reduced rice productivity. Mapping of chromosomal regions controlling cold tolerance will accelerate marker-assisted breeding of cold tolerant rice varieties. A recombinant inbred line (RIL) mapping population involving a rice cultivar ‘Bengal’ and a US weedy rice accession ‘PSRR-1’ was evaluated for cold tolerance at both germination and seedling stages. Observations on germinating ability and seedling vigor were recorded under both low temperature (13 °C) and optimum temperature (28 °C) at germination stage. ‘PSRR-1’ performed better than ‘Bengal’ under cold stress. Forty-nine QTL distributed over ten chromosomes were identified for 11 traits. The number of QTL varied from one to nine with phenotypic variability of each QTL ranging from 3.5 to 12.7%. For 18 QTL, ‘Bengal’ alleles were adaptable, whereas ‘PSRR-1’ alleles improved germination and seedling vigor under cold stress in 31 QTL. Three major QTL were observed for coleoptile length and seedling shoot length. The QTL were clustered in six chromosomal regions. The congruency of a QTL cluster on chromosome 11 in this study with earlier studies suggests a potential target for cloning cold tolerance genes at germination stage. Evaluation of cold tolerance at seedling stage was conducted by exposing rice seedlings at the 3rd leaf stage to 18/8 °C day/night temperature for 18 days and scoring of visual damage on a 1-9 scale. ‘Bengal’ showed higher tolerance to cold stress than ‘PSRR-1’. Twenty-three QTL for four cold tolerance traits were detected along all twelve chromosomes at seedling stage. The number of QTLs varied between four and eight per trait and each QTL contributed 2 to 42% of the total phenotypic variation. Bengal alleles increased cold stress tolerance in 10 QTL and PSRR-1 alleles in rest 13 QTLs. The most prominent one was on chromosome 11 which harbored a cluster of cold tolerance QTLs at both germination and seedling stage. This study demonstrated that weedy rice can be a valuable donor for enhancing cold tolerance in rice cultivars.
Subjects/Keywords: rice; cold tolerance; germination stage; seedling stage
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Borjas Artica, A. H. (2017). Molecular Genetics of Cold Tolerance at Germination and Seedling Stages in Rice. (Masters Thesis). Louisiana State University. Retrieved from etd-04032017-150415 ; https://digitalcommons.lsu.edu/gradschool_theses/4444
Chicago Manual of Style (16th Edition):
Borjas Artica, Anna Hissahe. “Molecular Genetics of Cold Tolerance at Germination and Seedling Stages in Rice.” 2017. Masters Thesis, Louisiana State University. Accessed February 28, 2021.
etd-04032017-150415 ; https://digitalcommons.lsu.edu/gradschool_theses/4444.
MLA Handbook (7th Edition):
Borjas Artica, Anna Hissahe. “Molecular Genetics of Cold Tolerance at Germination and Seedling Stages in Rice.” 2017. Web. 28 Feb 2021.
Vancouver:
Borjas Artica AH. Molecular Genetics of Cold Tolerance at Germination and Seedling Stages in Rice. [Internet] [Masters thesis]. Louisiana State University; 2017. [cited 2021 Feb 28].
Available from: etd-04032017-150415 ; https://digitalcommons.lsu.edu/gradschool_theses/4444.
Council of Science Editors:
Borjas Artica AH. Molecular Genetics of Cold Tolerance at Germination and Seedling Stages in Rice. [Masters Thesis]. Louisiana State University; 2017. Available from: etd-04032017-150415 ; https://digitalcommons.lsu.edu/gradschool_theses/4444

University of Missouri – Columbia
8.
Wagner, James Brinkman.
Suitability of cold-hardy loblolly and pitch x loblolly hybrid pines for commercial pine straw production in Missouri.
Degree: 2011, University of Missouri – Columbia
URL: http://hdl.handle.net/10355/14382
► [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Pine straw production is a multi-million dollar industry, primarily in the Southern United States.…
(more)
▼ [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Pine straw production is a multi-million dollar industry, primarily in the Southern United States. The pine species, Pinus palustris Mill., P. elliotii Eng. and P. taeda L., which are the primary sources for commercially produced pine straw, cannot survive winters in the Midwestern United States. In this study, ten P. rigida x taeda, and ten
cold-hardy P. taeda half-sib families, developed to thrive in colder climates, were evaluated for their suitability for commercial pine straw production, by comparing growth and form, needle length, pine straw yield, and resistance to snow and ice damage. For growth and winter damage resistance, the study found that all the families of P. rigida x taeda performed similarly to each other, and to results from previous studies of P. rigida x taeda. Needle characteristics for P. rigida x taeda were similar to those of P. taeda and were adequate for pine straw production. Pine straw yields were similar among all families of P. rigida x taeda and P. taeda. Growth rates and needle lengths of most of the ten
cold-hardy P. taeda families were similar to each other and greater than the P. rigida x taeda families in this study.
Cold-hardy P. taeda and P. rigida x taeda families withstood snow and ice damage to a similar extent. Based on our results, P. rigida x taeda and
cold-hardy P. taeda appear to be suitable for pine straw production in Midwestern climates.
Advisors/Committee Members: Starbuck, Christopher J. (advisor).
Subjects/Keywords: cold tolerance; pine tree; pine straw
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Chicago ·
MLA ·
Vancouver ·
CSE |
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to Zotero / EndNote / Reference
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APA (6th Edition):
Wagner, J. B. (2011). Suitability of cold-hardy loblolly and pitch x loblolly hybrid pines for commercial pine straw production in Missouri. (Thesis). University of Missouri – Columbia. Retrieved from http://hdl.handle.net/10355/14382
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wagner, James Brinkman. “Suitability of cold-hardy loblolly and pitch x loblolly hybrid pines for commercial pine straw production in Missouri.” 2011. Thesis, University of Missouri – Columbia. Accessed February 28, 2021.
http://hdl.handle.net/10355/14382.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wagner, James Brinkman. “Suitability of cold-hardy loblolly and pitch x loblolly hybrid pines for commercial pine straw production in Missouri.” 2011. Web. 28 Feb 2021.
Vancouver:
Wagner JB. Suitability of cold-hardy loblolly and pitch x loblolly hybrid pines for commercial pine straw production in Missouri. [Internet] [Thesis]. University of Missouri – Columbia; 2011. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/10355/14382.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wagner JB. Suitability of cold-hardy loblolly and pitch x loblolly hybrid pines for commercial pine straw production in Missouri. [Thesis]. University of Missouri – Columbia; 2011. Available from: http://hdl.handle.net/10355/14382
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
9.
Cinar, Ulas.
Assessment of Hard Red Spring Wheat Germplasm for Cold Temperature Germination Tolerance.
Degree: MS, Agronomy, Horticulture, and Plant Science, 2017, South Dakota State University
URL: https://openprairie.sdstate.edu/etd/1727
► When planted early in the season, hard red spring wheat (HRSW; Triticum aestivum L.) can help for both vegetative growth and yield providing maximum…
(more)
▼ When planted early in the season, hard red spring wheat (HRSW;
Triticum aestivum L.) can help for both vegetative growth and yield providing maximum agronomic productivity. The north-central Great Plains growing region is considered best for developing varieties that germinate in sub-optimal temperatures. Within limited regions, spring wheat planting typically occurs between mid-April and late May, when soil temperatures are 8 °C to 14 °C. Early season planting may result in freezing stress, while late season planting can result in heat and drought stress. Our study tested the germination rate of hard red spring wheat (HRSW) over a range of low temperatures within a laboratory environment. Ten HRSW populations were selected and four replications of 100 randomly chosen seeds of each genotype were tested at a series of temperatures (5°C, 7°C, 9°C, 11°C, 13°C, and 15°C). The purpose of this study was to review information on
cold temperature germination tolerances for the HRSW populations and develop a recommendation for early season planting of HRSW. As a result of this study, we found out that SD4011/BARLOW showed the highest germination rate at 5°C, whereas SD4330 was recorded as a highest germinating entry at the 5 °C to 15°C temperature range. The importance of this study is to help predict how cooler growing temperatures might affect planting dates and improve crop productivity in anticipation of climate warming which poses a significant threat to area farmers. According to USDA-NRCS, soil temperature data from the EROS Data center for SD five-year averages of soil temperatures showed that between first recorded 5°C and 11°C soil temperatures have approximately two weeks of differences. Planting may be completed up to two weeks earlier if a HRSW cultivar capable of germinating in cooler soils is used.
Advisors/Committee Members: Karl Glover.
Subjects/Keywords: cold tolerance; germination; spring wheat; Plant Sciences
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cinar, U. (2017). Assessment of Hard Red Spring Wheat Germplasm for Cold Temperature Germination Tolerance. (Masters Thesis). South Dakota State University. Retrieved from https://openprairie.sdstate.edu/etd/1727
Chicago Manual of Style (16th Edition):
Cinar, Ulas. “Assessment of Hard Red Spring Wheat Germplasm for Cold Temperature Germination Tolerance.” 2017. Masters Thesis, South Dakota State University. Accessed February 28, 2021.
https://openprairie.sdstate.edu/etd/1727.
MLA Handbook (7th Edition):
Cinar, Ulas. “Assessment of Hard Red Spring Wheat Germplasm for Cold Temperature Germination Tolerance.” 2017. Web. 28 Feb 2021.
Vancouver:
Cinar U. Assessment of Hard Red Spring Wheat Germplasm for Cold Temperature Germination Tolerance. [Internet] [Masters thesis]. South Dakota State University; 2017. [cited 2021 Feb 28].
Available from: https://openprairie.sdstate.edu/etd/1727.
Council of Science Editors:
Cinar U. Assessment of Hard Red Spring Wheat Germplasm for Cold Temperature Germination Tolerance. [Masters Thesis]. South Dakota State University; 2017. Available from: https://openprairie.sdstate.edu/etd/1727

University of Texas – Austin
10.
-7559-3021.
Effects of safety behaviors on distress tolerance : an experimental investigation.
Degree: MA, Psychology, 2019, University of Texas – Austin
URL: http://dx.doi.org/10.26153/tsw/5662
► This is the first study to investigate the effects of distress tolerance on safety behaviors through experimental manipulation of safety behaviors and the rationale of…
(more)
▼ This is the first study to investigate the effects of distress
tolerance on safety behaviors through experimental manipulation of safety behaviors and the rationale of their use. This study hypothesized that: (1) relative to no safety behavior controls, subjects who are randomized to use safety behaviors will display poorer distress
tolerance as measured by shorter immersion time (seconds) on a subsequent
cold pressor challenge, (2) participants who are led to believe that the safety aid (liquid) will prevent circulation problems (threat-relevant rationale) will show increased distress
tolerance (longer immersion time) in the first round but decreased distress
tolerance (shorter immersion time) in the second round of the
cold pressor compared to participants who used the safety aid without a threat-relevant rationale, because appraisals of threat increase when the safety behavior is removed, (3) individuals with low baseline distress
tolerance will be more sensitive to the threat-relevant rationale safety behavior manipulation than those with high baseline distress
tolerance. Therefore, individuals with low distress
tolerance at baseline and who are assigned to use safety behaviors with a threat-relevant rationale will have a larger decline in distress
tolerance (i.e. difference in immersion time) between the two challenges of the
cold pressor, and (4) differences in threat appraisal between Challenge 1 (safety behaviors with threat-relevant rationale available) and Challenge 2 (no safety behaviors available) will mediate the effects on differences in distress
tolerance (i.e. shorter immersion time) and emotional reactivity (i.e. negative affect) between the challenges. Inconsistent with our hypotheses, participants’ threat appraisals did not mediate the negative effects of safety behaviors on distress
tolerance; the difference of immersion time was not significantly shorter during the second round of the
cold pressor. Moreover, this mediation was not moderated by individuals’ levels of physical and emotional distress
tolerance at baseline. Confirming previous findings, this study’s results suggest that people with low physical dispositional distress
tolerance are doing worse overall when under distressing circumstances. The results also suggest that the influence of safety behaviors on dispositional distress
tolerance may not impede the effectiveness of anxiety disorder treatment
Advisors/Committee Members: Telch, Michael Joseph (advisor).
Subjects/Keywords: Distress tolerance; Cold pressor; Safety behaviors
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
-7559-3021. (2019). Effects of safety behaviors on distress tolerance : an experimental investigation. (Masters Thesis). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/5662
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-7559-3021. “Effects of safety behaviors on distress tolerance : an experimental investigation.” 2019. Masters Thesis, University of Texas – Austin. Accessed February 28, 2021.
http://dx.doi.org/10.26153/tsw/5662.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-7559-3021. “Effects of safety behaviors on distress tolerance : an experimental investigation.” 2019. Web. 28 Feb 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-7559-3021. Effects of safety behaviors on distress tolerance : an experimental investigation. [Internet] [Masters thesis]. University of Texas – Austin; 2019. [cited 2021 Feb 28].
Available from: http://dx.doi.org/10.26153/tsw/5662.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-7559-3021. Effects of safety behaviors on distress tolerance : an experimental investigation. [Masters Thesis]. University of Texas – Austin; 2019. Available from: http://dx.doi.org/10.26153/tsw/5662
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

University of Otago
11.
Raymond, Melianie Rosemary.
Cold-Temperature Adaptation in Nematodes from the Victoria Land Coast, Antarctica
.
Degree: 2011, University of Otago
URL: http://hdl.handle.net/10523/1804
► The invertebrates that inhabit Antarctica’s terrestrial ice-free areas are a unique resource for the study of adaptations to extreme conditions and illustrate the limits to…
(more)
▼ The invertebrates that inhabit Antarctica’s terrestrial ice-free areas are a unique resource for the study of adaptations to extreme conditions and illustrate the limits to which physiology can be stretched by evolution to allow life to continue.
Perhaps the most exciting result of past studies of these adaptations in the Antarctic’s terrestrial fauna was the discovery by Wharton and Ferns in 1995 of the survival of extensive intracellular freezing in the nematode Panagrolaimus davidi. Intracellular ice formation is generally considered fatal, and as the first and, so far, unique example of this adaptation in a multicellular organism, it has remained contentious. Understanding this adaptation could have important applications for cryopreservation, but research has currently been limited to this one species and based on a laboratory culture that have been isolated from its environment for over 20 years. There has been little research into the thermal tolerances of other Antarctic nematode species.
This thesis explores three broad research themes in order to contribute to the understanding of adaptation in Antarctic nematodes generally, and the survival of intracellular freezing specifically.
Firstly, to place their adaptations in an environmental context, the distribution of the nematode species found in two ice-free areas, around Cape Hallett in Northern Victoria Land and Gondwana station in Terra Nova Bay, is described and factors underlying their distribution patterns are investigated using regression models. Four nematode species were found: Panagrolaimus davidi, Scottnema lindsayae, Plectus murrayi and Eudorylaimus antarcticus. Their distribution patterns are correlated to both broad-scale habitat descriptors and to soil geochemistry, revealing species-specific differences in distribution patterns that are broadly consistent with other studies of these species in soils from the Dry Valleys and penguin rookeries on Ross Island. The importance of soil conductivity (as a measure of salinity) in predicting the distribution patterns of all four species supports the hypothesis that salinity plays a primary role in determining invertebrate distribution in the terrestrial Antarctic. The current environmental challenges faced by these Antarctic nematodes in their habitats are then described, providing context for laboratory investigations of their adaptations.
Secondly, the survival strategies employed by these nematodes are investigated. For P. davidi the survival of intracellular freezing was found to be strongly correlated with its nutritional status, explaining some of the variation in survival rates reported in previous studies. Plectus murrayi was also found to survive intracellular ice formation, providing a second example of an organism able to employ this survival strategy. The appearance of internal ice differed markedly between these two nematode species and that in a temperate species, Panagrellus redivivus, suggesting that adaptations enabling the survival of intracellular freezing involve the…
Advisors/Committee Members: Wharton, David (advisor).
Subjects/Keywords: Nematode;
Antarctica;
Cold tolerance;
Freezing tolerance;
Victoria Land
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Raymond, M. R. (2011). Cold-Temperature Adaptation in Nematodes from the Victoria Land Coast, Antarctica
. (Doctoral Dissertation). University of Otago. Retrieved from http://hdl.handle.net/10523/1804
Chicago Manual of Style (16th Edition):
Raymond, Melianie Rosemary. “Cold-Temperature Adaptation in Nematodes from the Victoria Land Coast, Antarctica
.” 2011. Doctoral Dissertation, University of Otago. Accessed February 28, 2021.
http://hdl.handle.net/10523/1804.
MLA Handbook (7th Edition):
Raymond, Melianie Rosemary. “Cold-Temperature Adaptation in Nematodes from the Victoria Land Coast, Antarctica
.” 2011. Web. 28 Feb 2021.
Vancouver:
Raymond MR. Cold-Temperature Adaptation in Nematodes from the Victoria Land Coast, Antarctica
. [Internet] [Doctoral dissertation]. University of Otago; 2011. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/10523/1804.
Council of Science Editors:
Raymond MR. Cold-Temperature Adaptation in Nematodes from the Victoria Land Coast, Antarctica
. [Doctoral Dissertation]. University of Otago; 2011. Available from: http://hdl.handle.net/10523/1804
12.
Rihan, Hail.
Plant tissue culture and artificial seed production techniques for cauliflower and their use to study molecular analysis of abiotic stress tolerance.
Degree: PhD, 2014, University of Plymouth
URL: http://hdl.handle.net/10026.1/3105
► A protocol for cauliflower micro-propagule production was developed and optimised for both micropropagation and artificial seed production techniques using meristematic tissues from cauliflower curd. All…
(more)
▼ A protocol for cauliflower micro-propagule production was developed and optimised for both micropropagation and artificial seed production techniques using meristematic tissues from cauliflower curd. All steps in the protocol were empirically optimised including: blending, sieving, culture methods, liquid culture media composition and plant growth regulator combinations and concentrations. The cost of the micro-propagules could be reduced by as much as 50% on the initial costings reported previously since treatments doubled the number of microshoots produced per culture unit. The research confirmed the suitability of cauliflower microshoots to be encapsulated as artificial seeds and an effective protocol for microshoot encapsulation was designed through the optimization of 1) the production of cauliflower microshoots suitable for encapsulation, 2) encapsulation procedures, 3) artificial seed artificial endosperm structure, 4) conversion materials. The possibility of culturing cauliflower artificial seeds in commercial substrates such as perlite, sand, vermiculite and compost was confirmed. The use of plant preservative mixture (PPM) for the control of contamination in cauliflower culture media and artificial seeds was optimised and the effect of this material on the development of plant material was assessed. It was confirmed that cauliflower artificial seed could be stored in a domestic refrigerator for up to 6 months which could have a great impact in cauliflower breeding programmes. The huge number of cauliflower microshoots that could be produced using this protocol and the homogeneity of the culture system, provided a tool for the molecular analysis of cauliflower microshoots (and artificial seed) abiotic stress tolerance analysis. Various treatments were conducted to improve microshoot cold tolerance and the up-regulation of the CBF/DREB1 transcription factor including low temperature acclimation, mannitol, ABA (abscisic acid) and Mo (molybdenum). Microshoots were confirmed to acclimate successfully using low temperature. Mo was shown to improve the cold tolerance of cauliflower microshoots and to up-regulate CBF/DREB1 in the absence of low temperature acclimation. Acclimation did not increase the accumulation of dehydrin proteins and it is concluded that dehydrins do not play a significant role in the cold tolerance of cauliflower microshoots. Since cauliflower breeding and seed multiplication protocols make extensive use of micropropagation, the studies reported in this research could make a significant impact by decreasing the cost of micropropagation and increasing its reliability. It also opens new perspectives for further research for cauliflower artificial seed production and the possibility of sowing these seeds directly in the field. Furthermore, this research helps to facilitate cauliflower breeding programmes by improving the understanding of abiotic stress tolerance mechanisms and the relationship between different types of abiotic stresses such as cold and drought.
Subjects/Keywords: 571.5; Abiotic stress tolerance; Artificial seeds; Cauliflower; CBF; Cold tolerance; Dehydrins
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rihan, H. (2014). Plant tissue culture and artificial seed production techniques for cauliflower and their use to study molecular analysis of abiotic stress tolerance. (Doctoral Dissertation). University of Plymouth. Retrieved from http://hdl.handle.net/10026.1/3105
Chicago Manual of Style (16th Edition):
Rihan, Hail. “Plant tissue culture and artificial seed production techniques for cauliflower and their use to study molecular analysis of abiotic stress tolerance.” 2014. Doctoral Dissertation, University of Plymouth. Accessed February 28, 2021.
http://hdl.handle.net/10026.1/3105.
MLA Handbook (7th Edition):
Rihan, Hail. “Plant tissue culture and artificial seed production techniques for cauliflower and their use to study molecular analysis of abiotic stress tolerance.” 2014. Web. 28 Feb 2021.
Vancouver:
Rihan H. Plant tissue culture and artificial seed production techniques for cauliflower and their use to study molecular analysis of abiotic stress tolerance. [Internet] [Doctoral dissertation]. University of Plymouth; 2014. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/10026.1/3105.
Council of Science Editors:
Rihan H. Plant tissue culture and artificial seed production techniques for cauliflower and their use to study molecular analysis of abiotic stress tolerance. [Doctoral Dissertation]. University of Plymouth; 2014. Available from: http://hdl.handle.net/10026.1/3105

Kansas State University
13.
Moolakkal Antony, Reshma.
Screening
maize and sorghum for chilling tolerance at seedling
stage.
Degree: MS, Department of
Agronomy, 2018, Kansas State University
URL: http://hdl.handle.net/2097/39023
► Low temperature is one of the most limiting stresses to crops that are adapted to tropical and subtropical regions, such as maize (Zea mays L.)…
(more)
▼ Low temperature is one of the most limiting stresses
to crops that are adapted to tropical and subtropical regions, such
as maize (Zea mays L.) and sorghum [Sorghum bicolor (L.) Moench],
when introduced into temperate regions. However, no studies have
compared the chilling
tolerance of maize and sorghum grown
together. Therefore, the objective of this research was to screen
maize hybrids and sorghum genotypes for chilling
tolerance at the
germination and seedling stages. With the hypothesis that grain
composition of maize and sorghum could lead to varying chilling
tolerance, the seeds were analyzed for concentrations of protein,
starch, and amylose. Five commercial hybrids of maize and 18
genotypes of sorghum were maintained in growth chambers for 31 days
at two temperatures: a control temperature (25/20 °C, day/night)
and at chilling temperatures (11/8 °C for 14 days; 12.5/9.5 °C for
14 days, and 14/11 °C for 3 days). Emergence and seedling height
were measured during the experiment. At the end of the experiment,
shoot dry weight, root dry weight, and leaf area were determined.
Emergence of sorghum under the chilling temperature regime was low
(18%). Average height of the emerged sorghum seedlings in the
cold
temperatures at the end of the experiment was 1.4 cm compared to
55.5 cm in the control treatment. All maize hybrids emerged, but
emergence and growth were slowed by the
cold temperatures, and
average height at the end of the experiment was 4.6 cm compared to
96.1 cm in the control treatment. Shoot dry weight, root dry
weight, and leaf area of the sorghum under the chilling
temperatures were too small to measure, and, for maize, they were
greatly reduced. The results showed that, for sorghum, temperatures
should be above 14 °C for emergence, while maize could emerge at
lower temperatures.
The analyses of the sorghum seeds showed that
Redbine 60 and RTx430 had the highest protein concentrations
(15.71% and 15.35%, respectively), and Segaolane had the lowest
protein concentration (9.83%). Segaolane had the highest starch
concentration (72.71%), and RTx430 had the lowest starch
concentration (65.31%). There was an inverse relationship between
protein and starch concentrations in the sorghum seeds (R2 = 0.69).
Amylose concentrations did not vary significantly among the sorghum
seeds. The analyses of the maize seeds showed that Dekalb 51-20 and
Pioneer 1151 had the highest protein concentrations (10.98% and
10.95%, respectively), and Pioneer 1105 had the lowest protein
concentration (9.26%). Starch and amylose concentrations did not
vary significantly among the maize seeds.
Advisors/Committee Members: S.V. Krishna Jagadish.
Subjects/Keywords: Sorghum;
Maize; Chilling
tolerance; Seedling
stage; Cold
tolerance; Grain
composition
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moolakkal Antony, R. (2018). Screening
maize and sorghum for chilling tolerance at seedling
stage. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/39023
Chicago Manual of Style (16th Edition):
Moolakkal Antony, Reshma. “Screening
maize and sorghum for chilling tolerance at seedling
stage.” 2018. Masters Thesis, Kansas State University. Accessed February 28, 2021.
http://hdl.handle.net/2097/39023.
MLA Handbook (7th Edition):
Moolakkal Antony, Reshma. “Screening
maize and sorghum for chilling tolerance at seedling
stage.” 2018. Web. 28 Feb 2021.
Vancouver:
Moolakkal Antony R. Screening
maize and sorghum for chilling tolerance at seedling
stage. [Internet] [Masters thesis]. Kansas State University; 2018. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/2097/39023.
Council of Science Editors:
Moolakkal Antony R. Screening
maize and sorghum for chilling tolerance at seedling
stage. [Masters Thesis]. Kansas State University; 2018. Available from: http://hdl.handle.net/2097/39023

University of Western Ontario
14.
Mckinnon, Alexander H.
Freeze tolerance in the spring field cricket, Gryllus veletis.
Degree: 2015, University of Western Ontario
URL: https://ir.lib.uwo.ca/etd/2944
► Many insects are able to survive internal ice formation. However, the mechanisms underlying freeze tolerance are not well-understood, perhaps because of a lack of suitable…
(more)
▼ Many insects are able to survive internal ice formation. However, the mechanisms underlying freeze tolerance are not well-understood, perhaps because of a lack of suitable model organisms. I found that the spring field cricket, Gryllus veletis, seasonally acquires freeze tolerance in the fall when kept outside in London, Ontario. Moreover, individuals acquired freeze tolerance in the laboratory in response to a simulated fall thermophotoperiod. Lab-acclimated G. veletis freeze at -6.1 ± 0.7 ºC and the acquisition of freeze tolerance is accompanied by the accumulation of proline and trehalose. Crickets survived temperatures as low as -12 ºC (1.5 h), and for one week at -8 °C. Lab-acclimated crickets were more cold-hardy than field-acclimatized crickets, with higher survival at both -12 ºC and after one week at -8 °C. Gryllus veletis is a suitable candidate for further investigating freeze tolerance because it is easily reared and manipulated in a controlled laboratory environment.
Subjects/Keywords: Gryllidae; freeze tolerance; cryoprotectants; overwintering; cold tolerance; model systems; Systems and Integrative Physiology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mckinnon, A. H. (2015). Freeze tolerance in the spring field cricket, Gryllus veletis. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/2944
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mckinnon, Alexander H. “Freeze tolerance in the spring field cricket, Gryllus veletis.” 2015. Thesis, University of Western Ontario. Accessed February 28, 2021.
https://ir.lib.uwo.ca/etd/2944.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mckinnon, Alexander H. “Freeze tolerance in the spring field cricket, Gryllus veletis.” 2015. Web. 28 Feb 2021.
Vancouver:
Mckinnon AH. Freeze tolerance in the spring field cricket, Gryllus veletis. [Internet] [Thesis]. University of Western Ontario; 2015. [cited 2021 Feb 28].
Available from: https://ir.lib.uwo.ca/etd/2944.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mckinnon AH. Freeze tolerance in the spring field cricket, Gryllus veletis. [Thesis]. University of Western Ontario; 2015. Available from: https://ir.lib.uwo.ca/etd/2944
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

North Carolina State University
15.
Reynolds, William Casey.
Establishment Rates and Growth Characteristics of Six Bermudagrass Cultivars for use on Athletic Fields and Golf Course Fairways.
Degree: MS, Crop Science, 2002, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/2167
► Bermudagrass (Cynodon spp.) is the primary choice for athletic fields and golf course fairways in the southeastern United States. Its superior heat and drought tolerance…
(more)
▼ Bermudagrass (Cynodon spp.) is the primary choice for athletic fields and golf course fairways in the southeastern United States. Its superior heat and drought
tolerance as well as excellent recuperative capacity allow it to withstand many of the stresses often associated with recreational turf. There are several new cultivars on the market with little available information regarding their performance. Six cultivars of bermudagrass, 'TifSport', 'Tifway', 'GN-1', 'Quickstand', 'Navy Blue', and 'Tifton 10' were established by sprigs on a Candor sand (Sandy, siliceous, thermic, Arenic Paleudult) at the rate of 0.1m3/100m2 on 28 June 2001 at the Sandhills Research Station in Jackson Springs, NC. During year one of the study, data were taken on establishment, rooting, disease incidence, fall color, and spring green-up of each of the six bermudagrasses. Tifton 10 demonstrated the ability to establish faster than all other cultivars based on its ranking on all observation dates followed by Quickstand and GN-1, which had five and four top rankings, respectively. No differences in rooting density were found among the six cultivars. Navy Blue exhibited significantly more dollar spot (Sclerotinia homoeocarpa F.T. Bennett) incidence than all other cultivars, while GN-1 had significanctly higher incidence of Large patch (Rhizoctonia solani). During April 2002, 10.8 cm diameter plugs were taken from the field plots for the low temperature study. Sixty stolons per cultivar were excised from the plugs and placed into a Low Temperature Stress Simulator (LTSS) where they were exposed to four different temperatures of 2°C, 0°C, -2°C, and -4 °C for a period of 24 hr. No significant differences were found among cultivars in their ability to tolerate low temperatures, but mortality did increase as temperature decreased. After the field plots had achieved one year of growth, data were taken on growth characteristics such as root and rhizome mass, recuperative potential, surface hardness, seedhead production, and overall quality. No significant differences were found in root or rhizome mass among the six cultivars. Quickstand produced a harder surface than all other cultivars on 24 July, while Tifton 10, GN-1, and TifSport were the softest. TifSport consistently produced the highest turf quality of the six cultivars followed by Tifway, GN-1, and Navy Blue. Quickstand and Tifton 10 had the poorest quality over four observation dates, primarily due to their coarse texture and off-green color. Differences among these six bermudagrass cultivars imply that they may not all be suitable for the same situation. Turfgrass managers can match this data to their intended use and more accurately choose which cultivar will perform best under their specific conditions.
Advisors/Committee Members: Charles H. Peacock, Committee Co-Chair (advisor), Richard J. Cooper, Committee Co-Chair (advisor), Arthur H. Bruneau, Committee Member (advisor), Mitzi Montoya-Weiss, Committee Member (advisor).
Subjects/Keywords: Bermudagrass; Cold Tolerance; TifSport
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APA (6th Edition):
Reynolds, W. C. (2002). Establishment Rates and Growth Characteristics of Six Bermudagrass Cultivars for use on Athletic Fields and Golf Course Fairways. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/2167
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Reynolds, William Casey. “Establishment Rates and Growth Characteristics of Six Bermudagrass Cultivars for use on Athletic Fields and Golf Course Fairways.” 2002. Thesis, North Carolina State University. Accessed February 28, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/2167.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Reynolds, William Casey. “Establishment Rates and Growth Characteristics of Six Bermudagrass Cultivars for use on Athletic Fields and Golf Course Fairways.” 2002. Web. 28 Feb 2021.
Vancouver:
Reynolds WC. Establishment Rates and Growth Characteristics of Six Bermudagrass Cultivars for use on Athletic Fields and Golf Course Fairways. [Internet] [Thesis]. North Carolina State University; 2002. [cited 2021 Feb 28].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/2167.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Reynolds WC. Establishment Rates and Growth Characteristics of Six Bermudagrass Cultivars for use on Athletic Fields and Golf Course Fairways. [Thesis]. North Carolina State University; 2002. Available from: http://www.lib.ncsu.edu/resolver/1840.16/2167
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Guelph
16.
Wolyn, David J.
Cold-acclimation among Genotypes of Asparagus (Asparagus officinalis L.) under Controlled and Field Conditions.
Degree: MS, Department of Plant Agriculture, 2014, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8095
► Winterhardiness is important for asparagus grown in temperate regions. To improve the trait through breeding, genetic variation and reliable selection methodology are required. Seedlings of…
(more)
▼ Winterhardiness is important for asparagus grown in temperate regions. To improve the trait through breeding, genetic variation and reliable selection methodology are required. Seedlings of three cultivars with varying adaptation to Southern Ontario were acclimated under different combinations of temperature and photoperiod, and freezing
tolerance and metabolites were assessed. Only low-temperature induced freezing-
tolerance, cultivar response varied consistently with field longevity observations, and the trait was correlated with chlorophyll concentration, crown dehydration, and crown proline and high-molecular-weight fructan (HF) concentrations. In a field study, germplasm acclimated under natural conditions varied for metabolites associated with freezing
tolerance, including storage root and rhizome percentage water, and concentrations of fern chlorophyll, storage root glucose, sucrose, and proline, and rhizome HF. Narrow-sense heritability estimates were moderate for fern chlorophyll, rhizome glucose and sucrose, and storage root proline concentrations. Improving winterhardiness in asparagus may be possible through selecting heritable traits in a seedling assay.
Advisors/Committee Members: Wolyn, David J. (advisor).
Subjects/Keywords: Asparagus; cold acclimation; freezing tolerance; growth chamber; low temperature; photoperiod; senescence
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APA (6th Edition):
Wolyn, D. J. (2014). Cold-acclimation among Genotypes of Asparagus (Asparagus officinalis L.) under Controlled and Field Conditions. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8095
Chicago Manual of Style (16th Edition):
Wolyn, David J. “Cold-acclimation among Genotypes of Asparagus (Asparagus officinalis L.) under Controlled and Field Conditions.” 2014. Masters Thesis, University of Guelph. Accessed February 28, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8095.
MLA Handbook (7th Edition):
Wolyn, David J. “Cold-acclimation among Genotypes of Asparagus (Asparagus officinalis L.) under Controlled and Field Conditions.” 2014. Web. 28 Feb 2021.
Vancouver:
Wolyn DJ. Cold-acclimation among Genotypes of Asparagus (Asparagus officinalis L.) under Controlled and Field Conditions. [Internet] [Masters thesis]. University of Guelph; 2014. [cited 2021 Feb 28].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8095.
Council of Science Editors:
Wolyn DJ. Cold-acclimation among Genotypes of Asparagus (Asparagus officinalis L.) under Controlled and Field Conditions. [Masters Thesis]. University of Guelph; 2014. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8095

University of Guelph
17.
Avila Bolivar, Luis Mariano.
Molecular analyses of internode elongation and cold stress tolerance in maize.
Degree: PhD, Department of Plant Agriculture, 2016, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/10030
► Modulation of internode elongation can impact maize (Zea mays L.) yield. In maize, plant height is often positively correlated with grain and biomass yields. Conversely,…
(more)
▼ Modulation of internode elongation can impact maize (Zea mays L.) yield. In maize, plant height is often positively correlated with grain and biomass yields. Conversely, semi dwarf varieties have been used to achieve higher grain yields in wheat and sorghum by preventing lodging and by allocating more resources to grain filling instead of vegetative tissues.
Tolerance to suboptimal temperatures is also a sought after trait in maize, as it would make possible to expand the cultivated areas to higher latitudes and allow for early planting, resulting in a longer growing season and higher yields. In this thesis I apply the tools and resources available since the publication of the first maize genome draft to investigate internode elongation and
cold tolerance in maize. Using a forward genetics approach I identified GRMZM2G366698 (an inositol polyphosphate 5- phosphatase) as the gene affected by the mutation in brevis plant1 (bv1), a semi dwarf mutant of maize first reported in the 1930’s. Further characterization of bv1 and a study of the RNA transcript abundance differences between bv1 and wild type maize plants suggest that auxin mediated inositol polyphosphate and/or phosphoinositide signalling are implicated in maize stem elongation. I used RNA-Seq to investigate the transcriptional response of seedlings of
cold tolerant CG60 and
cold sensitive CG102 maize inbreds during
cold stress and recovery after the
cold stress. I found that the
cold treatment caused changes in the expression of more than 40% of the genes expressed in leaves, with repression of genes involved in photosynthesis, and induction of genes involved in transcription regulation and protein phosphorylation. Transcript abundances observed 24 hours after returning to optimal growing temperature identified genes that could be involved in acclimation to
cold or whose expression has been disrupted by the stress.
Advisors/Committee Members: Lukens, Lewis (advisor).
Subjects/Keywords: maize; mutant; internode elongation; bv1; brevis; cold tolerance; RNA-Seq
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Chicago ·
MLA ·
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CSE |
Export
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APA (6th Edition):
Avila Bolivar, L. M. (2016). Molecular analyses of internode elongation and cold stress tolerance in maize. (Doctoral Dissertation). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/10030
Chicago Manual of Style (16th Edition):
Avila Bolivar, Luis Mariano. “Molecular analyses of internode elongation and cold stress tolerance in maize.” 2016. Doctoral Dissertation, University of Guelph. Accessed February 28, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/10030.
MLA Handbook (7th Edition):
Avila Bolivar, Luis Mariano. “Molecular analyses of internode elongation and cold stress tolerance in maize.” 2016. Web. 28 Feb 2021.
Vancouver:
Avila Bolivar LM. Molecular analyses of internode elongation and cold stress tolerance in maize. [Internet] [Doctoral dissertation]. University of Guelph; 2016. [cited 2021 Feb 28].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/10030.
Council of Science Editors:
Avila Bolivar LM. Molecular analyses of internode elongation and cold stress tolerance in maize. [Doctoral Dissertation]. University of Guelph; 2016. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/10030

University of Toronto
18.
Peixoto, Murilo.
Low Temperature Performance of Leading Bioenergy Crops Utilizing the C4 Photosynthetic Pathway.
Degree: PhD, 2015, University of Toronto
URL: http://hdl.handle.net/1807/69461
► The use of bioenergy has been considered one of the most important solutions for the reduction in the dependence on fossil fuels and to mitigate…
(more)
▼ The use of bioenergy has been considered one of the most important solutions for the reduction in the dependence on fossil fuels and to mitigate global climate change. C4 perennial grasses stands as the best alternative for biofuel feedstock and Miscanthus x giganteus has shown outstanding performance in cool climates. In addition, sugarcane has a history of high productivity and success in the biofuel industry of Brazil. The high photosynthetic rate at low temperature (14º to 20ºC) and radiation use efficiency of M. x giganteus allow this plant to build a vast canopy early in the spring, allowing it to intercept high amounts of solar radiation once temperature rise in summer, obtaining high yields of biomass by the end of growing season. It is unclear, however, how Miscanthus will tolerate the severe winter
cold and frequent episodic frost in the spring of higher latitudes, like Canada. Here, I show that rhizomes of diploid Miscanthus can tolerate temperatures above -14ºC if sub-zero acclimation is allowed, while allopolyploid Miscanthus are tolerant to temperatures above -6.5ºC. Also, in contrary to M. sinensis, shoots of Miscanthus hybrids were killed when exposed to sunlight at temperatures below 10ºC in the spring. However, triploid Miscanthus showed great recovery and three weeks later plants had a vast and closed canopy while M. sinensis plants had a poor canopy. Lastly, I show that upland and lowland Hawaiian sugarcane grown at two moderate temperatures have little variation in temperature response and acclimation to low temperature. Because of its high productivity, Miscanthus should be considered in areas where it can securely be grown. According to the results found here, rhizomes of diploid Miscanthus have the potential to be grown up to 60ºN, but the frequency of episodic chilling events should also be taken into consideration. Here, I show that the genepool of the Miscanthus genus has the potential to increase
cold tolerance in the most productive lines, which will increase the range for this crop. Sugarcane is still restricted to tropical and subtropical zones, but higher
cold tolerance can be achieved by hybridizing this plant with Miscanthus.
Advisors/Committee Members: Sage, Rowan F, Ecology and Evolutionary Biology.
Subjects/Keywords: C4 photosynthesis; cold acclimation; freezing tolerance; Miscanthus; photoinhibition; sugarcane; 0309
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Peixoto, M. (2015). Low Temperature Performance of Leading Bioenergy Crops Utilizing the C4 Photosynthetic Pathway. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/69461
Chicago Manual of Style (16th Edition):
Peixoto, Murilo. “Low Temperature Performance of Leading Bioenergy Crops Utilizing the C4 Photosynthetic Pathway.” 2015. Doctoral Dissertation, University of Toronto. Accessed February 28, 2021.
http://hdl.handle.net/1807/69461.
MLA Handbook (7th Edition):
Peixoto, Murilo. “Low Temperature Performance of Leading Bioenergy Crops Utilizing the C4 Photosynthetic Pathway.” 2015. Web. 28 Feb 2021.
Vancouver:
Peixoto M. Low Temperature Performance of Leading Bioenergy Crops Utilizing the C4 Photosynthetic Pathway. [Internet] [Doctoral dissertation]. University of Toronto; 2015. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/1807/69461.
Council of Science Editors:
Peixoto M. Low Temperature Performance of Leading Bioenergy Crops Utilizing the C4 Photosynthetic Pathway. [Doctoral Dissertation]. University of Toronto; 2015. Available from: http://hdl.handle.net/1807/69461

University of Minnesota
19.
Christianson, Lindsey.
Host influence on the cold hardiness of the emerald ash borer, *Agrilus planipennis* Fairmaire (Coleoptera: Buprestidae).
Degree: MS, Entomology, 2014, University of Minnesota
URL: http://hdl.handle.net/11299/174752
► The emerald ash borer, Agrilus planipennis Fairmaire, is an invasive insect in North America that has caused extensive damage to ash trees throughout its invaded…
(more)
▼ The emerald ash borer, Agrilus planipennis Fairmaire, is an invasive insect in North America that has caused extensive damage to ash trees throughout its invaded range. The range of Fraxinus spp., specifically black ash (Fraxinus nigra) extends farther north than the known A. planipennis distribution. The ability of an insect to withstand cold, or its cold hardiness, is important in limiting its northern distribution. The cold hardiness of A. planipennis from green ash and black ash was assessed using two laboratory measures, supercooling points and lower lethal temperature, in laboratory- and naturally-infested A. planipennis larvae. Supercooling points of A. planipennis larvae from black and green ash, with medians ranging from 25.5 to 32.6°C and 24.0 to 34.2°C respectively, were not significantly different during the winters of 2012-13 and 2013-14, although the laboratory infested larvae tested in November 2011 had significantly warmer supercooling points. Kaplan-Meier estimates of the likelihood of freezing of larvae from black ash and green ash were not significantly different between tree species or between years. A high proportion of larvae died after being frozen, but freezing did not kill all larvae. Lower lethal temperatures for 50% of the population (LT50) were estimated after accounting for the proportion of larvae that would survive freezing. LT50s of larvae from green ash were 35.2°C (95% CI 35.9°C, 34.7°C) in the winter of 2012-13 and 33.4°C ( 34.1°C, 32.1°C) in the winter of 2013-14. Larvae from black ash had estimated lower lethal temperatures of 33.4°C ( 34.4°C, 32.3°C) in 2012-13 and 33.1°C (≤ 37.5°C, 35.5°C) in 2013-14. Agrilus planipennis larvae overwinter under the bark of ash trees, so larvae may not be experiencing winter air temperatures. To determine temperatures under the bark of ash trees, temperature probes were placed under the bark of both green and black ash at 1.4m high and at the base of the tree on the north and south faces. Weather stations recorded air temperature. Daily minimum temperatures under the bark of green ash ranged from 0.5 to 4.7°C warmer than daily minimum air temperatures, and temperatures were 1.2 to 5 degrees warmer under the bark of black ash. Temperatures at the base of the trees provided the most insulation, possibly due to any snow cover adding to the insulative effect of the bark. During the time in which we took measurements, the air temperature fell below 30°C for an average of 16 hours during the winter of 2012-13. Temperatures under the bark of green ash did not reach -30°C, and temperatures under the bark of black ash fell below -30°C, on average, for 2.6 hours. In 2013-14, air temperature was 30°C or colder for an average of 146.1 hours, 78.1 hours under the bark of green ash, and 118.7 hours under the bark of black ash. Because of the differences in air temperatures and temperatures under the bark of trees, we cannot use air temperature to directly predict A. planipennis mortality. Because under-bark temperatures do…
Subjects/Keywords: cold tolerance; Fraxinus nigra; Fraxinus pennsylvanica; invasive species; under bark temperatures
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Christianson, L. (2014). Host influence on the cold hardiness of the emerald ash borer, *Agrilus planipennis* Fairmaire (Coleoptera: Buprestidae). (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/174752
Chicago Manual of Style (16th Edition):
Christianson, Lindsey. “Host influence on the cold hardiness of the emerald ash borer, *Agrilus planipennis* Fairmaire (Coleoptera: Buprestidae).” 2014. Masters Thesis, University of Minnesota. Accessed February 28, 2021.
http://hdl.handle.net/11299/174752.
MLA Handbook (7th Edition):
Christianson, Lindsey. “Host influence on the cold hardiness of the emerald ash borer, *Agrilus planipennis* Fairmaire (Coleoptera: Buprestidae).” 2014. Web. 28 Feb 2021.
Vancouver:
Christianson L. Host influence on the cold hardiness of the emerald ash borer, *Agrilus planipennis* Fairmaire (Coleoptera: Buprestidae). [Internet] [Masters thesis]. University of Minnesota; 2014. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/11299/174752.
Council of Science Editors:
Christianson L. Host influence on the cold hardiness of the emerald ash borer, *Agrilus planipennis* Fairmaire (Coleoptera: Buprestidae). [Masters Thesis]. University of Minnesota; 2014. Available from: http://hdl.handle.net/11299/174752

University of Minnesota
20.
Cira, Theresa.
Managing Halyomorpha halys: Effects of cold tolerance, insecticides, and linguistic uncertainty.
Degree: PhD, Entomology, 2017, University of Minnesota
URL: http://hdl.handle.net/11299/194627
► Managing pests effectively and efficiently requires knowledge about their biology. Likewise, clear communication about scientific research pertaining to management is needed for managers to make…
(more)
▼ Managing pests effectively and efficiently requires knowledge about their biology. Likewise, clear communication about scientific research pertaining to management is needed for managers to make well-informed decisions. My research pertains to the biology of the brown marmorated stink bug, Halyomorpha halys and communication between scientists about insecticidal categorization. Halyomorpha halys is an exotic invasive species in North America. Many horticultural and agricultural plants in North America are at risk for economic damage due to the highly polyphagous nature of this species. Additionally, H. halys has become a serious nuisance pest in human-made structures in some areas when, in preparation for winter, they aggregate in sheltered structures. Therefore, factors such as cold and insecticides, which affect H. halys distribution and ability to cause crop injury are of particular interest to develop management plans. I first conducted several studies of cold tolerance on H. halys in North America. I found that H. halys exhibits a chill-intolerant cold tolerance strategy, that season, sex, and acclimation location affect cold tolerance (i.e., supercooling points), and that laboratory assays of lethal temperature were able to accurately forecast winter mortality in the field. Second, I studied H. halys diapause in more depth. I present a protocol for rearing diapausing H. halys in the laboratory that exhibit similar cold tolerance (i.e., supercooling points and lower lethal temperatures) as individuals with field-induced diapause. I found that H. halys diapause confers greater cold tolerance than a non-diapausing state, and appears to be necessary to survive overwintering. Additionally, I showed diapausing H. halys actively feed for at least three weeks post-diapause induction, but feeding is mediated by temperature and adult age. Third, I investigated and critiqued the current paradigm for determining insecticidal efficacy on H. halys. I highlighted important sublethal effects of insecticides on feeding that can significantly reduce crop injury without the necessity of high direct mortality to H. halys. Lastly, using an interdisciplinary lens I examined linguistic uncertainty as it pertains to categories and descriptors of insecticides. I demonstrated the presence and consequences of linguistically uncertain terms associated with insecticides and encouraged entomologists to more adequately acknowledge and address these uncertainties in future research.
Subjects/Keywords: brown marmorated stink bug; cold tolerance; diapause; efficacy; insecticide; linguistic uncertainty
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cira, T. (2017). Managing Halyomorpha halys: Effects of cold tolerance, insecticides, and linguistic uncertainty. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/194627
Chicago Manual of Style (16th Edition):
Cira, Theresa. “Managing Halyomorpha halys: Effects of cold tolerance, insecticides, and linguistic uncertainty.” 2017. Doctoral Dissertation, University of Minnesota. Accessed February 28, 2021.
http://hdl.handle.net/11299/194627.
MLA Handbook (7th Edition):
Cira, Theresa. “Managing Halyomorpha halys: Effects of cold tolerance, insecticides, and linguistic uncertainty.” 2017. Web. 28 Feb 2021.
Vancouver:
Cira T. Managing Halyomorpha halys: Effects of cold tolerance, insecticides, and linguistic uncertainty. [Internet] [Doctoral dissertation]. University of Minnesota; 2017. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/11299/194627.
Council of Science Editors:
Cira T. Managing Halyomorpha halys: Effects of cold tolerance, insecticides, and linguistic uncertainty. [Doctoral Dissertation]. University of Minnesota; 2017. Available from: http://hdl.handle.net/11299/194627

Clemson University
21.
Crickenberger, Samuel.
Range Limits, Range Shifts, and Lower Thermal Tolerance in the Tropical Barnacle Megabalanus coccopoma.
Degree: PhD, Biological Sciences, 2014, Clemson University
URL: https://tigerprints.clemson.edu/all_dissertations/1390
► Climate change and species introductions are leading to shifts in marine species' geographic distributions. However, few studies have examined range limits and range shifts…
(more)
▼ Climate change and species introductions are leading to shifts in marine species' geographic distributions. However, few studies have examined range limits and range shifts in tropical marine species. The barnacle Megabalanus coccopoma is native to shorelines from Baja California to Peru and has been introduced to a number of locations worldwide including the Atlantic US SE coast, where its current introduced range extends from Ft. Pierce, FL to Cape Hatteras, NC with seasonal populations as far north as Kitty Hawk, NC. In order to understand the potential poleward range limit of M. coccopoma in the US SE under modern day climate regimes, the larval and adult lower thermal tolerances were examined and larval energy budgets were used to estimate the potential extent of larval dispersal. The distribution of M. coccopoma was then surveyed within the Atlantic US SE during the summers of 2010, 2011, and 2012. Changes in the range documented during these surveys were used to test the predictive accuracy of the species distribution model MaxEnt using data from the global range, the native range and the Atlantic US SE range. In contrast to work done with temperate species, which suggests larval thermal tolerances often set range limits, adult thermal tolerances corresponded most closely to current range limits. Larval energetic reserves may limit the extent of the seasonal range. Surveys revealed that, following the
cold winter months of 2010, the range of M. coccopoma retracted down to northern Florida, rapidly re-expanded during 2011 and was re-established in its previous range by the summer of 2012. This range re-expansion is the fastest documented for any marine invertebrate and is one of the few documented for any tropical marine organism. When MaxEnt was used to predict the range retraction and range limits of M. coccopoma, only the MaxEnt model trained on the US SE data was able to accurately predict both the range retraction and range limits prior to the range retraction. Consideration of the range limiting mechanism(s) and spatial variation in the mechanism(s) is fundamentally important in accurately predicting range limits and even more so in predicting range shifts. In many marine species, and particularly in tropical species, lower limits to functionality and cumulative chill damage are likely the mechanisms responsible for setting poleward range limits at above freezing temperatures. Limited selection in tropical marine species for the ability to acclimate to
cold temperatures may result in more ephemeral range expansions when compared to temperate species when both are moving poleward.
Advisors/Committee Members: Dr. Saara DeWalt, Dr. Amy Moran, Dr. Michael Childress, Dr. Peter Marko, Dr. Michael Sears.
Subjects/Keywords: cold tolerance; larval energy budget; MaxEnt; Megabalanus coccopoma; tropical; Biology
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Crickenberger, S. (2014). Range Limits, Range Shifts, and Lower Thermal Tolerance in the Tropical Barnacle Megabalanus coccopoma. (Doctoral Dissertation). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_dissertations/1390
Chicago Manual of Style (16th Edition):
Crickenberger, Samuel. “Range Limits, Range Shifts, and Lower Thermal Tolerance in the Tropical Barnacle Megabalanus coccopoma.” 2014. Doctoral Dissertation, Clemson University. Accessed February 28, 2021.
https://tigerprints.clemson.edu/all_dissertations/1390.
MLA Handbook (7th Edition):
Crickenberger, Samuel. “Range Limits, Range Shifts, and Lower Thermal Tolerance in the Tropical Barnacle Megabalanus coccopoma.” 2014. Web. 28 Feb 2021.
Vancouver:
Crickenberger S. Range Limits, Range Shifts, and Lower Thermal Tolerance in the Tropical Barnacle Megabalanus coccopoma. [Internet] [Doctoral dissertation]. Clemson University; 2014. [cited 2021 Feb 28].
Available from: https://tigerprints.clemson.edu/all_dissertations/1390.
Council of Science Editors:
Crickenberger S. Range Limits, Range Shifts, and Lower Thermal Tolerance in the Tropical Barnacle Megabalanus coccopoma. [Doctoral Dissertation]. Clemson University; 2014. Available from: https://tigerprints.clemson.edu/all_dissertations/1390

Louisiana State University
22.
Bastola, Anup.
Ecology and Biology of the Redbanded Stink Bug, Piezodorus guildinii (Westwood) in Louisiana.
Degree: PhD, Entomology, 2017, Louisiana State University
URL: https://digitalcommons.lsu.edu/gradschool_dissertations/4147
► The redbanded stink bug, Piezodorus guildinii (Westwood) is an invasive stink bug species that was first documented as a soybean pest in Louisiana during…
(more)
▼ The redbanded stink bug, Piezodorus guildinii (Westwood) is an invasive stink bug species that was first documented as a soybean pest in Louisiana during the year 2000. This species continues to expand northward in the MidSouth but information is lacking on its biology and ecology in the U.S. In order to determine P. guildinii’s northern range, studies were designed to investigate the cold tolerance ability of this species. The mean supercooling points of adult P. guildinii ranged from highest -8.3 ± 0.2°C in March to the lowest of -11.0 ± 0.2°C in January. Evaluation of lethal exposure time (LT50) and (LT90) at subzero temperatures of 0°C, -2°C, and -5°C respectively showed that this insect had high mortality due to chill injury at these temperatures. Winter survival under field conditions was significantly different in two years of the study as mortality increased with progression of winter months. Next, in order to determine spring bridging hosts, field studies were conducted to evaluate the preference of P. guildinii to six leguminous cover crops. Our study showed that crimson clover, Trifolium incarnatum (L.) and white clover, Trifolium repens (L.) are the preferred spring hosts as well as being the main reproductive host plants of P. guildinii. These hosts are therefore important linking hosts leading to P. guildinii infestation into soybean production field in Louisiana. In order to predict recolonization of soybean fields after spray applications, studies were conducted on P. guildinii movement. The dispersion of adult and nymph stink bugs was monitored using protein marking via the mark-captured method. Protein marking was a viable option which provided direct proof of insect movement. The adult P. guildinii dispersed up to 137 m along and 15.3 m across the soybean rows. Evidence of dispersion of nymphs up to 122 m along and 11.7 m across the soybean rows was also documented.
Subjects/Keywords: Redbanded stink bug; Cold tolerance; host preference; dispersal
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bastola, A. (2017). Ecology and Biology of the Redbanded Stink Bug, Piezodorus guildinii (Westwood) in Louisiana. (Doctoral Dissertation). Louisiana State University. Retrieved from https://digitalcommons.lsu.edu/gradschool_dissertations/4147
Chicago Manual of Style (16th Edition):
Bastola, Anup. “Ecology and Biology of the Redbanded Stink Bug, Piezodorus guildinii (Westwood) in Louisiana.” 2017. Doctoral Dissertation, Louisiana State University. Accessed February 28, 2021.
https://digitalcommons.lsu.edu/gradschool_dissertations/4147.
MLA Handbook (7th Edition):
Bastola, Anup. “Ecology and Biology of the Redbanded Stink Bug, Piezodorus guildinii (Westwood) in Louisiana.” 2017. Web. 28 Feb 2021.
Vancouver:
Bastola A. Ecology and Biology of the Redbanded Stink Bug, Piezodorus guildinii (Westwood) in Louisiana. [Internet] [Doctoral dissertation]. Louisiana State University; 2017. [cited 2021 Feb 28].
Available from: https://digitalcommons.lsu.edu/gradschool_dissertations/4147.
Council of Science Editors:
Bastola A. Ecology and Biology of the Redbanded Stink Bug, Piezodorus guildinii (Westwood) in Louisiana. [Doctoral Dissertation]. Louisiana State University; 2017. Available from: https://digitalcommons.lsu.edu/gradschool_dissertations/4147

University of Maryland
23.
Grant, Jessica Irene.
Phenology and Cold Tolerance of Megacopta cribraria: An Invasive Soybean Pest at its Northern Limit.
Degree: Entomology, 2016, University of Maryland
URL: http://hdl.handle.net/1903/19019
► Megacopta cribraria, kudzu bug, is an invasive pest of soybeans in the Southeast United States, with a northern distribution limit in Maryland. Soybeans, however, are…
(more)
▼ Megacopta cribraria, kudzu bug, is an invasive pest of soybeans in the Southeast United States, with a northern distribution limit in Maryland. Soybeans, however, are grown north of Maryland, which places producers at risk of future range shifts. Additionally, producers in the current distribution need a development model to aid management. To address both concerns, I studied the
cold tolerance of the kudzu bug and its phenology. I examined the supercooling point (SCP) and lethal temperature to kill 50% (LLT50) of three populations over the fall of 2015 to determine the
cold tolerance. I found the kudzu bug is a freeze avoidant species with an average SCP of -12.6°C and LLT50 of -5.1°C. I also determined that the kudzu bug moves to thermally protected leaf litter in late November to overwinter. To address phenology, I determined the kudzu bug requires 625 degree-days at a minimum temperature of 16°C to complete egg and nymphal development. Field validation fit the model well with a biofix of May 1st and 30 days for a preoviposition period. The phenological degree-day model indicates two generations per year and allows producers evaluate and time pest management strategies within a year.
Cold tolerance enables producers to predict the surviving population each year as well as the potential for northward range expansion.
Advisors/Committee Members: Lamp, William O (advisor).
Subjects/Keywords: Entomology; Cold Tolerance; Kudzu bug; Maryland; Megacopta cribraria; Northern Limit; Phenology
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APA ·
Chicago ·
MLA ·
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APA (6th Edition):
Grant, J. I. (2016). Phenology and Cold Tolerance of Megacopta cribraria: An Invasive Soybean Pest at its Northern Limit. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/19019
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Grant, Jessica Irene. “Phenology and Cold Tolerance of Megacopta cribraria: An Invasive Soybean Pest at its Northern Limit.” 2016. Thesis, University of Maryland. Accessed February 28, 2021.
http://hdl.handle.net/1903/19019.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Grant, Jessica Irene. “Phenology and Cold Tolerance of Megacopta cribraria: An Invasive Soybean Pest at its Northern Limit.” 2016. Web. 28 Feb 2021.
Vancouver:
Grant JI. Phenology and Cold Tolerance of Megacopta cribraria: An Invasive Soybean Pest at its Northern Limit. [Internet] [Thesis]. University of Maryland; 2016. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/1903/19019.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Grant JI. Phenology and Cold Tolerance of Megacopta cribraria: An Invasive Soybean Pest at its Northern Limit. [Thesis]. University of Maryland; 2016. Available from: http://hdl.handle.net/1903/19019
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech
24.
Bova, Jacob Edward.
Overwintering Mechanisms of La Crosse Virus Vectors.
Degree: PhD, Entomology, 2018, Virginia Tech
URL: http://hdl.handle.net/10919/98590
► The La Crosse virus (LACV) is an emerging pathogen in the Appalachian region of the United States. The virus maintains a complex natural cycle through…
(more)
▼ The La Crosse virus (LACV) is an emerging pathogen in the Appalachian region of the United States. The virus maintains a complex natural cycle through horizontal transmission with sciurid rodents and Aedes mosquitoes in Virginia. Transovarial transmission also occurs in this host-parasite system and has evolved for the virus to persist through winter. The virus perpetuates in diapause induced embryos and infects naive rodents the following spring. As global temperatures rise, it is imperative we evaluate how the virus and its vectors overwinter. We conducted experiments to evaluate and determine the diapause induction, or prediapause stage, in Aedes japonicus japonicus, and the ecophysiology and low temperature biology of how LACV affects Aedes triseriatus and Aedes albopictus embryos at low temperatures. We found that the prediapause stage of Ae. j. japonicus is the maternal stage, the developing adult female that lays diapause eggs. This more closely resembles Ae. albopictus and not Ae. triseriatus. As measured in the field and laboratory, LACV has a clear negative effect on the ability of Ae. triseriatus and Ae. albopictus to survive the winter. There was no major effect of LACV infection on the ability of these two species to enter diapause or their critical photoperiods, but there was a significant negative effect of LACV infection on survivorship of embryos that were placed in their natural habitat and in their susceptibility to low temperatures. LACV infection had a more significant negative effect on Ae. albopictus than on Ae. triseriatus and suggests that Ae. albopictus is a subordinate vector relative to Ae. triseriatus in the maintenance of the virus over the winter season. Our findings highlight the need for the increased surveillance of LACV as temperatures continue to rise due to climate change.
Advisors/Committee Members: Paulson, Sally L. (committeechair), Brewster, Carlyle C. (committee member), Sharakhova, Maria V. (committee member), Harris, Maria-Richetta Camille (committee member), Marek, Paul (committee member).
Subjects/Keywords: La Crosse virus; Aedes; diapause; critical photoperiod; overwintering; cold tolerance
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bova, J. E. (2018). Overwintering Mechanisms of La Crosse Virus Vectors. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/98590
Chicago Manual of Style (16th Edition):
Bova, Jacob Edward. “Overwintering Mechanisms of La Crosse Virus Vectors.” 2018. Doctoral Dissertation, Virginia Tech. Accessed February 28, 2021.
http://hdl.handle.net/10919/98590.
MLA Handbook (7th Edition):
Bova, Jacob Edward. “Overwintering Mechanisms of La Crosse Virus Vectors.” 2018. Web. 28 Feb 2021.
Vancouver:
Bova JE. Overwintering Mechanisms of La Crosse Virus Vectors. [Internet] [Doctoral dissertation]. Virginia Tech; 2018. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/10919/98590.
Council of Science Editors:
Bova JE. Overwintering Mechanisms of La Crosse Virus Vectors. [Doctoral Dissertation]. Virginia Tech; 2018. Available from: http://hdl.handle.net/10919/98590

University of Texas – Austin
25.
-7958-1586.
Ecology and evolution of cold tolerance in Panicum hallii.
Degree: PhD, Plant Biology, 2018, University of Texas – Austin
URL: http://dx.doi.org/10.26153/tsw/2259
► Given that plants are sessile organism, they are continuously challenged by both biotic and abiotic stresses in natural and agricultural conditions which they are forced…
(more)
▼ Given that plants are sessile organism, they are continuously challenged by both biotic and abiotic stresses in natural and agricultural conditions which they are forced to acclimate or adapt. One of the major abiotic stressors affecting plant growth and development, and thereby limiting distribution of plants and crop production, is low temperature. It is estimated that crop yield is affected by
cold stress in 57% of the global land area. To study the ecology and evolution of
cold tolerance in plants, Hall's panicgrass (Panicum hallii), a perennial C₄ grass native to North America, was used to investigate
cold tolerance due to its adaptation to diverse environments across its natural distribution. Three approaches were followed in this study: 1. The genetic diversity and population structure as well the response to
cold stress were evaluated in samples collected across the natural distributions of the species. 2. Then, genomic regions associated to response to
cold temperatures were found by QTL analysis of a RIL population. 3. Finally, a global transcriptome analysis was conducted in a set of selected phenotypes to identify candidate genes involved in
cold responses. For the population genetic approach, we evaluated the genomic and morphological diversity as well as the genetic structure of the C₄ grass Panicum hallii using ddRAD molecular approaches. We found strong genetic and morphological divergence between varieties and strong genetic structure between the seven populations that was strongly correlated with geological and ecological conditions. Following the genetic diversity analyses, we utilized QTL and global gene expression approaches to determine the early chilling stress transcriptome response of P. hallii. This analysis revealed 16 genes occurring within a major QTL interval and exhibiting expression responses. Six genes were previously associated with responses to
cold stress in studies with other plant species, and five genes were identified with unknown functions. Accordingly, the results here not only aid in the discovery of the genetic mechanism that underline local adaptation but also provide a foundation to improve switchgrass yield under
cold conditions
Advisors/Committee Members: Juenger, Thomas (advisor), Jha, Shalene (committee member), Lowry, David B (committee member), Linder, Randy (committee member), Roux, Stan (committee member).
Subjects/Keywords: Grasses; Panicum hallii; Cold tolerance; QTL; Genetic diversity; Transcriptome
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
-7958-1586. (2018). Ecology and evolution of cold tolerance in Panicum hallii. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/2259
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-7958-1586. “Ecology and evolution of cold tolerance in Panicum hallii.” 2018. Doctoral Dissertation, University of Texas – Austin. Accessed February 28, 2021.
http://dx.doi.org/10.26153/tsw/2259.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-7958-1586. “Ecology and evolution of cold tolerance in Panicum hallii.” 2018. Web. 28 Feb 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-7958-1586. Ecology and evolution of cold tolerance in Panicum hallii. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2018. [cited 2021 Feb 28].
Available from: http://dx.doi.org/10.26153/tsw/2259.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-7958-1586. Ecology and evolution of cold tolerance in Panicum hallii. [Doctoral Dissertation]. University of Texas – Austin; 2018. Available from: http://dx.doi.org/10.26153/tsw/2259
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
26.
Gantz, Josiah D.
The physiological and ecological implications of rapid
acclimatory responses in insects.
Degree: PhD, Zoology, 2018, Miami University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=miami154302051413521
► When challenged by brief exposure to sub-lethal stresses, insects and other small ectotherms can make physiological adjustments that enhance their stress tolerance within minutes. Through…
(more)
▼ When challenged by brief exposure to sub-lethal
stresses, insects and other small ectotherms can make physiological
adjustments that enhance their stress
tolerance within minutes.
Through these rapid acclimatory responses, insects adjust their
physiology to track ambient conditions and counter the negative
effects of perturbation by abiotic stresses. Although rapid
acclimation is best studied as a response to brief chilling,
diverse environmental cues, including high temperature,
dehydration, and anoxia trigger similar responses. Further, recent
evidence suggests that different cues for rapid acclimation trigger
distinct mechanistic responses. This dissertation investigated the
underpinning physiology and ecological importance of these diverse
rapid acclimatory responses in three species of flies.The first
project compared the physiological mechanisms triggered by brief
chilling and dehydration in larvae of the freeze-tolerant goldenrod
gall fly, Eurosta solidaginis. Chilling produced solute
accumulation in larval hemolymph and caused the activation of the
second messenger p38 MAP kinase, while dehydration caused a
redistribution of body water without significant accumulation of
solutes and activated both p38 and Erk1/2 MAP kinase. Additionally,
though neither treatment differed from control treatments, larvae
that were chilled for 2 h maintained a higher metabolic rate at low
temperatures than those that were dehydrated.The second project
examined the effects that brief chilling and dehydration have on
flight performance and fecundity in the flesh fly Sarcophaga
bullata. Both triggers for rapid acclimation enhanced distance
flown, peak velocity, increased flight time under stressful
conditions, and preserved reproductive output. These results
suggest that rapid acclimation helps insects to maintain basic
behaviors when faced with stress in nature.The final project
investigated the effects of brief exposure to diverse abiotic
stresses in larvae of the Antarctic midge, Belgica antarctica.
These larvae increased their
tolerance of freezing after just 2 h
of exposure to sub-lethal temperature extremes, osmotic
perturbation, acidic and alkaline conditions, UV irradiation, and
starvation. Thus, rapid acclimatory responses can be triggered by
many more abiotic stresses than were previously recognized.In
summary, diverse abiotic stresses trigger rapid acclimatory
responses that enhance stress
tolerance in ecologically relevant
ways.
Advisors/Committee Members: Lee, Richard (Advisor).
Subjects/Keywords: Physiology; Insect; rapid cold-hardening; generalized rapid acclimatory response; stress tolerance
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gantz, J. D. (2018). The physiological and ecological implications of rapid
acclimatory responses in insects. (Doctoral Dissertation). Miami University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=miami154302051413521
Chicago Manual of Style (16th Edition):
Gantz, Josiah D. “The physiological and ecological implications of rapid
acclimatory responses in insects.” 2018. Doctoral Dissertation, Miami University. Accessed February 28, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=miami154302051413521.
MLA Handbook (7th Edition):
Gantz, Josiah D. “The physiological and ecological implications of rapid
acclimatory responses in insects.” 2018. Web. 28 Feb 2021.
Vancouver:
Gantz JD. The physiological and ecological implications of rapid
acclimatory responses in insects. [Internet] [Doctoral dissertation]. Miami University; 2018. [cited 2021 Feb 28].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami154302051413521.
Council of Science Editors:
Gantz JD. The physiological and ecological implications of rapid
acclimatory responses in insects. [Doctoral Dissertation]. Miami University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami154302051413521

University of California – Berkeley
27.
Stuart, Stephanie Alexandra.
Cold Comfort: Diversification and Adaptive Evolution across Latitudinal Gradients.
Degree: Integrative Biology, 2011, University of California – Berkeley
URL: http://www.escholarship.org/uc/item/3ph7c2nj
► Angiosperms originated during a prolonged climatic greenhouse, and their early fossil record comes exclusively from low paleolatitudes. Thus, the ancestral ecological niche of flowering plants…
(more)
▼ Angiosperms originated during a prolonged climatic greenhouse, and their early fossil record comes exclusively from low paleolatitudes. Thus, the ancestral ecological niche of flowering plants was most likely tropical. Tropical origins have shaped the subsequent ecological boundaries and evolutionary opportunities faced by descendents of these ancestors. This has had profound consequences for the subsequent diversification and ecology of this large and important group. Here, these consequences are explored from three different points of view, and at three different scales, with the goal of understanding the evolution of freezing-tolerant clades and the traits that facilitate their survival.Chapter 1 begins with a broad view of angiosperm evolution, encompassing the entire clade at a global scale. It uses phylogenetically independent contrasts to test the relative contributions of area, latitude, and climate to diversification patterns through time. The analysis shows that expansions in latitudinal range, rather than expansions in total area, are the strongest correlate of increased diversification through the history of this clade. Phylogenetically independent results are then compared with present-day patterns. The present-day latitudinal diversity gradient is demonstrated to be the result of a tropical origin rather than intrinsically higher speciation rates in the tropics.The origin of the pattern seen in Chapter 1 is explored in Chapter 2, by examining whether greater functional diversity occurs in wet tropical environments, which are the putative ancestral niche of flowering plants, or through adaptation to seasonal environments. Three different rainforest sites in Australia are studied. A wet tropical community is contrasted with two seasonal communities: one which is seasonally dry, and another which is seasonally cold. A link between seasonality and increased functional diversity is demonstrated for traits relating to water use and cold tolerance. A new method is presented for testing the relative contribution of phylogenetic niche conservatism to shifts in trait means between communities. This method is used to demonstrate that, in these three forests, traits relating to successional status are conserved, while traits relating to water used and cold tolerance are evolutionarily labile.In Chapter 3, a specific hypothesis about the origins of cold tolerance is presented. It is argued that seasonally dry environments could provide an evolutionary stepping stone between wet tropical and temperate environments, based on a known link between molecular mechanisms of drought and freezing acclimation. Individuals from seven eudicot clades are collected from the same system of wet tropical, dry tropical, and temperate forests used in Chapter 2. On being subjected to a controlled freezing profile, plants from the dry tropical forest show considerably more resistance to damage than their relatives from the wet tropical environment. This demonstrates that acclimation to drought is a plausible pathway for the evolution of…
Subjects/Keywords: Biology; Ecology; Evolution & development; Angiosperm Diversification; Cold Tolerance; Evolution of Freezing Tolerance; Phylogenetic Niche Conservatism; Temperate Radiation; Tropical Temperate Comparison
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Stuart, S. A. (2011). Cold Comfort: Diversification and Adaptive Evolution across Latitudinal Gradients. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/3ph7c2nj
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Stuart, Stephanie Alexandra. “Cold Comfort: Diversification and Adaptive Evolution across Latitudinal Gradients.” 2011. Thesis, University of California – Berkeley. Accessed February 28, 2021.
http://www.escholarship.org/uc/item/3ph7c2nj.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Stuart, Stephanie Alexandra. “Cold Comfort: Diversification and Adaptive Evolution across Latitudinal Gradients.” 2011. Web. 28 Feb 2021.
Vancouver:
Stuart SA. Cold Comfort: Diversification and Adaptive Evolution across Latitudinal Gradients. [Internet] [Thesis]. University of California – Berkeley; 2011. [cited 2021 Feb 28].
Available from: http://www.escholarship.org/uc/item/3ph7c2nj.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Stuart SA. Cold Comfort: Diversification and Adaptive Evolution across Latitudinal Gradients. [Thesis]. University of California – Berkeley; 2011. Available from: http://www.escholarship.org/uc/item/3ph7c2nj
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
28.
Lu, X.
Bioinformatics, gene functional and germplasm physiology feature studies of Zea may ssp. mexicana L. under cold and other environmental stresses.
Degree: 2017, University of Tasmania
URL: https://eprints.utas.edu.au/23861/1/Lu_whole_thesis.pdf
► The annual Zea mays ssp. mexicana L., a member of teosinte, has strong growth and regeneration ability, high tiller numbers, high protein and lysine content…
(more)
▼ The annual Zea mays ssp. mexicana L., a member of teosinte, has strong growth and regeneration ability, high tiller numbers, high protein and lysine content as well as resistance to many fungal diseases. It is a close wild relative of maize thus it can be effectively used in maize improvement. Most lines of Zea mays ssp. mexicana L. originated at high altitude in northern and central Mexico with a large spikelet and are adapted to acid soil. Since the best temperature for growing Zea mays ssp. mexicana L. ranges from 25 °C to 35 °C, it is considered to be more sensitive to cold/drought than to high temperature, especially during germination and early autotrophic growth stages. This project set out to detect the cold and/or drought tolerance of Zea mays ssp. mexicana L., using bioinformatics, gene functions and physiological features contributing to both stresses. The aims were to provide an effective approach to understand the responses of Zea mays ssp. mexicana L. to low temperature and drought. The understanding of molecular mechanisms for cold/drought tolerance can also help distinguish Zea mays ssp. mexicana L. from other tropical or temperate plants as well as provide useful references in improving abiotic stress tolerance of maize.
In a transcriptome study, we generated a seedling plant transcriptome at a sequencing size of 51.78 Gb of Zea mays ssp. mexicana L. under stress free, cold or drought stress conditions. A total of 414,232,462 high quality clean reads were used to conduct de novo assembly and annotation of genes without reference genome information. All of these reads were assembled into 251,145 transcripts (N50 = 1,269 bp) and 184,280 unigenes (N50 = 923 bp). A total of 3,504 up-regulated and 1,220 down-regulated genes were detected under cold stress and 532 up-regulated and 82 down-regulated genes were detected under drought stress. A total of 208 genes were affected by both cold and drought stresses. Examination of these genes suggested that the ABA dependent pathway, trehalose synthetic pathway and the CBF6 gene of the ICE1-CBF pathway may play important roles in both stress tolerances of Zea mays ssp. mexicana L. Compared with the maize transcriptome database, GAs of Zea mays ssp. mexicana L. showed significant differences in regulating the responses to cold. These important functional genes identified in this study and the information on molecular mechanisms for cold and drought tolerance can provide useful references in improving abiotic stress tolerance of maize.
In gene functional studies, ZmmICE1 and ZmmSIZ2, two important cold related genes, were cloned and isolated from a cDNA library of RNA-Seq from cold-treated seedling tissues of Zea mays ssp. mexicana L. ZmmICE1, a novel MYC-type ICE-like transcription factor gene, enhanced freezing tolerance in transgenic Arabidopsis thaliana. As a novel transcription factor, the ZmmICE1 protein localized in the nucleus and showed sumoylation when expressed in an Escherichia coli reconstitution system. ZmmICE1 showed ICE1-family characteristics,…
Subjects/Keywords: Zea may ssp. mexicana L.; transcriptome; cold and drought tolerance; Differentially expressed genes; ZmmICE1;
freezing tolerance; transgenic arabidopsis thaliana; chlorophyll fluorescence
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lu, X. (2017). Bioinformatics, gene functional and germplasm physiology feature studies of Zea may ssp. mexicana L. under cold and other environmental stresses. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/23861/1/Lu_whole_thesis.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lu, X. “Bioinformatics, gene functional and germplasm physiology feature studies of Zea may ssp. mexicana L. under cold and other environmental stresses.” 2017. Thesis, University of Tasmania. Accessed February 28, 2021.
https://eprints.utas.edu.au/23861/1/Lu_whole_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lu, X. “Bioinformatics, gene functional and germplasm physiology feature studies of Zea may ssp. mexicana L. under cold and other environmental stresses.” 2017. Web. 28 Feb 2021.
Vancouver:
Lu X. Bioinformatics, gene functional and germplasm physiology feature studies of Zea may ssp. mexicana L. under cold and other environmental stresses. [Internet] [Thesis]. University of Tasmania; 2017. [cited 2021 Feb 28].
Available from: https://eprints.utas.edu.au/23861/1/Lu_whole_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lu X. Bioinformatics, gene functional and germplasm physiology feature studies of Zea may ssp. mexicana L. under cold and other environmental stresses. [Thesis]. University of Tasmania; 2017. Available from: https://eprints.utas.edu.au/23861/1/Lu_whole_thesis.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Western Ontario
29.
Des Marteaux, Lauren E.
Mechanisms Underlying Variation in Insect Chill Tolerance: The Role of Ion and Water Transport.
Degree: 2017, University of Western Ontario
URL: https://ir.lib.uwo.ca/etd/4536
► Water and ion homeostasis has emerged as an important factor limiting chill-susceptible insects at low temperatures; loss of this homeostasis in the cold likely contributes…
(more)
▼ Water and ion homeostasis has emerged as an important factor limiting chill-susceptible insects at low temperatures; loss of this homeostasis in the cold likely contributes to chronic chilling injury, and reestablishment of homeostasis is required for recovery from chilling. Both plastic and interspecific variation in cold tolerance correlates with enhanced defense of water and ion homeostasis during cold exposure, however the mechanisms are poorly understood. Using Gryllus crickets, I generated and tested hypotheses about the mechanisms underlying this variation in transport function. I first related interspecific variation in cold tolerance to water and ion balance in early chill coma. A rapid influx of Na+ to the hemolymph suggests that Na+ first leaks from the tissues, and could drive migration of Na+ and water to the gut. Gryllus veletis (a more cold-tolerant species) may avoid or slow this Na+ leak by maintaining lower hemolymph Na+ content and lower osmotic pressure between the gut and hemolymph, compared to G. pennsylvanicus. Plasticity in defense of water and ion homeostasis during cold exposure is thought to involve enhanced active transport function and/or decreased permeability of ionoregulatory tissues. Using G. pennsylvanicus I identified specific candidate mechanisms related to these transport function modifications by comparing the hindgut and Malpighian tubule transcriptomes of warm- and cold-acclimated individuals. Cold acclimation modified the expression of hindgut and Malpighian tubule ion transporters, and hindgut structural (cytoskeletal and cell junction) genes. Rectal macromorphology and rectal pad scalariform complex ultrastructure were unchanged (suggesting that modified permeability does not involve these structural elements), however cytoskeletal modifications do protect rectal pad actin stability during cold shock. Cold acclimation decreases excretion rate (i.e. active transport) across the Malpighian tubules, which may be driven by modified activity of Na+-K+ ATPase but not of V-ATPase. Increased expression of hindgut Na+-K+ ATPase did not alter the activity of this enzyme in the rectum. Overall I show that cold acclimation modifies active transport function in the Malpighian tubules and modifies rectal pad structure to enhance cytoskeletal stability during cold exposure.
Subjects/Keywords: Cricket; Gryllus; cold tolerance; cold acclimation; ionoregulation; water balance; Malpighian tubules; hindgut; transcriptome; Comparative and Evolutionary Physiology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Des Marteaux, L. E. (2017). Mechanisms Underlying Variation in Insect Chill Tolerance: The Role of Ion and Water Transport. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/4536
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Des Marteaux, Lauren E. “Mechanisms Underlying Variation in Insect Chill Tolerance: The Role of Ion and Water Transport.” 2017. Thesis, University of Western Ontario. Accessed February 28, 2021.
https://ir.lib.uwo.ca/etd/4536.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Des Marteaux, Lauren E. “Mechanisms Underlying Variation in Insect Chill Tolerance: The Role of Ion and Water Transport.” 2017. Web. 28 Feb 2021.
Vancouver:
Des Marteaux LE. Mechanisms Underlying Variation in Insect Chill Tolerance: The Role of Ion and Water Transport. [Internet] [Thesis]. University of Western Ontario; 2017. [cited 2021 Feb 28].
Available from: https://ir.lib.uwo.ca/etd/4536.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Des Marteaux LE. Mechanisms Underlying Variation in Insect Chill Tolerance: The Role of Ion and Water Transport. [Thesis]. University of Western Ontario; 2017. Available from: https://ir.lib.uwo.ca/etd/4536
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

York University
30.
Yerushalmi, Gil.
Describing the Ionoregulatory Changes that Underlie Cold Acclimation in Drosophila Melanogaster.
Degree: MSc -MS, Biology, 2018, York University
URL: http://hdl.handle.net/10315/35479
► At low temperatures Drosophila lose the ability to regulate ion and water balance across the gut leading to a lethal accumulation of K+ in the…
(more)
▼ At low temperatures Drosophila lose the ability to regulate ion and water balance across the gut leading to a lethal accumulation of K+ in the haemolymph (hyperkalemia).
Cold-acclimation can mitigate these ion imbalances, but the physiological mechanisms that facilitate this process are still not understood. Upon adult emergence, D. melanogaster females were subjected to seven days at 25C (warm-acclimation) or 10C (
cold-acclimation).
Cold-acclimation reduced the critical thermal minimum (CTmin), sped up recovery from chill coma, improved survival following
cold stress, and mitigated
cold-induced hyperkalemia. In parallel,
cold-acclimated flies experienced increased Malpighian tubule fluid and K+ secretion and reduced rectal K+ reabsorption. These changes were independent of Na+/K+- or V-type H+-ATPases. These results suggest that modification of Malpighian tubule and gut mitigate
cold-induced hyperkalemia. Additionally, I present preliminary findings on the effects of acclimation, sex, and blood-feeding on the
cold tolerance of the arboviral disease vector mosquito, A. aegypti.
Advisors/Committee Members: Donini, Andrew (advisor).
Subjects/Keywords: Animal sciences; Insect; Cold tolerance; Drosophila; Melanogaster; Acclimation; Cold acclimation; Ion balance; Malpighian tubules; Rectum; Aedes; Aegypti
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APA (6th Edition):
Yerushalmi, G. (2018). Describing the Ionoregulatory Changes that Underlie Cold Acclimation in Drosophila Melanogaster. (Masters Thesis). York University. Retrieved from http://hdl.handle.net/10315/35479
Chicago Manual of Style (16th Edition):
Yerushalmi, Gil. “Describing the Ionoregulatory Changes that Underlie Cold Acclimation in Drosophila Melanogaster.” 2018. Masters Thesis, York University. Accessed February 28, 2021.
http://hdl.handle.net/10315/35479.
MLA Handbook (7th Edition):
Yerushalmi, Gil. “Describing the Ionoregulatory Changes that Underlie Cold Acclimation in Drosophila Melanogaster.” 2018. Web. 28 Feb 2021.
Vancouver:
Yerushalmi G. Describing the Ionoregulatory Changes that Underlie Cold Acclimation in Drosophila Melanogaster. [Internet] [Masters thesis]. York University; 2018. [cited 2021 Feb 28].
Available from: http://hdl.handle.net/10315/35479.
Council of Science Editors:
Yerushalmi G. Describing the Ionoregulatory Changes that Underlie Cold Acclimation in Drosophila Melanogaster. [Masters Thesis]. York University; 2018. Available from: http://hdl.handle.net/10315/35479
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