You searched for subject:(Temperature Effect on Adhesion).
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University of Missouri – Columbia
1.
Nguyen, Hien (Hien Thi Thu).
Effect of temperature on a soybean [Glycine max (L.) Merr.] mutant.
Degree: 2013, University of Missouri – Columbia
URL: https://doi.org/10.32469/10355/43157 
► [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Soybean is influenced by temperature and light, and global warming has been shown to reduce…
(more)
▼ [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Soybean is influenced by
temperature and light, and global warming has been shown to reduce soybean yields. In this study we tested the germination of TM-Miniature, a soybean mutant with dwarf phenotype, and TM-Normal and two other genotypes in response to high temperatures of 38 °C, 40 °C, and a control
temperature of 28 °C. The results showed that a mutation might cause TM-Miniature seedlings to be more thermotolerant than TM-Normal and the two other genotypes at emergence. We also examined the morphology and anatomy of TM-Miniature and TM-Normal in response to a range of
temperature and photoperiods conditions. The data indicated clearly that TM-Miniature phenotype was influenced by night
temperature and light interruption of the dark period. Leaves of TM-Miniature plants were very small at low night
temperature while the leaf thickness remained unchanged. The upper and lower epidermal cell layers decreased in thickness as nighttime
temperature increased. In addition, stomatal density and stomatal index decreased in TM-Miniature. TM-Miniature is controlled by a single mutant gene. Glyma14g36890 is an interesting candidate gene and was found near the Satt560 marker that co-segregated with the miniature trait. This gene was amplified and sequenced to study nucleotide differences between TM-Normal and William 82. The sequenced armadillo gene in our study did not show nucleotide differences in the predicted promoter region and exon gene region. However, there appear to be sequence differences in a predicted intron.
Advisors/Committee Members: Fritschi, Felix B., 1969- (advisor).
Subjects/Keywords: Soybean – Effect of temperature on
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APA (6th Edition):
Nguyen, H. (. T. T. (2013). Effect of temperature on a soybean [Glycine max (L.) Merr.] mutant. (Thesis). University of Missouri – Columbia. Retrieved from https://doi.org/10.32469/10355/43157
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):
Nguyen, Hien (Hien Thi Thu). “Effect of temperature on a soybean [Glycine max (L.) Merr.] mutant.” 2013. Thesis, University of Missouri – Columbia. Accessed April 14, 2021.
https://doi.org/10.32469/10355/43157.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nguyen, Hien (Hien Thi Thu). “Effect of temperature on a soybean [Glycine max (L.) Merr.] mutant.” 2013. Web. 14 Apr 2021.
Vancouver:
Nguyen H(TT. Effect of temperature on a soybean [Glycine max (L.) Merr.] mutant. [Internet] [Thesis]. University of Missouri – Columbia; 2013. [cited 2021 Apr 14].
Available from: https://doi.org/10.32469/10355/43157.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nguyen H(TT. Effect of temperature on a soybean [Glycine max (L.) Merr.] mutant. [Thesis]. University of Missouri – Columbia; 2013. Available from: https://doi.org/10.32469/10355/43157
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rutgers University
2.
Ricketti, Daniel Anthony.
Energy levels increase while survivability decreases as temperature rises across Drosophila species.
Degree: MS, Biology, 2014, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/43555/
► In response to changes in temperature, organisms that are adapted to survive cold temperatures implement thermoregulatory systems that adjust their growth, locomotion, reproduction, and other…
(more)
▼ In response to changes in
temperature, organisms that are adapted to survive cold temperatures implement thermoregulatory systems that adjust their growth, locomotion, reproduction, and other physiological functions. We predict species that have been isolated in an extreme environment will have thermoregulatory and compensatory mechanisms increasing their tolerance to survive adverse conditions. For example, in ice worms, an increase in adenosine triphosphate (ATP) levels has been associated with cold tolerance. The recycling of Adenosine monophosphate or adenosine monophosphate (AMP) regulates adenosine diphosphate (ADP) levels. Thus, the degradation of AMP by AMP phosphatase (AMPP) and AMP deaminase (AMPD) controls the levels of ATP. We use Drosophila species endemic to different environments to study how changes in
temperature affect them. Drosophila species thrive in different environments on the globe, thus providing a system to answer evolutionary questions about
temperature adaptation. To test these mechanisms, we used D. melanogaster a temperate, widely distributed species, a D. funebris strain native to Alaska, and D. mojavensis a cactolaphilic species. We measured ATP levels, survivability and mobility of these flies at a diverse range of
temperature points. Species-specific differences in tolerance to these abnormal temperatures were observed.
Advisors/Committee Members: Yakoby, Nir (chair), Shain, Daniel H (internal member), Nam, Jongmin (internal member).
Subjects/Keywords: Drosophila – Effect of temperature on
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APA (6th Edition):
Ricketti, D. A. (2014). Energy levels increase while survivability decreases as temperature rises across Drosophila species. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/43555/
Chicago Manual of Style (16th Edition):
Ricketti, Daniel Anthony. “Energy levels increase while survivability decreases as temperature rises across Drosophila species.” 2014. Masters Thesis, Rutgers University. Accessed April 14, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/43555/.
MLA Handbook (7th Edition):
Ricketti, Daniel Anthony. “Energy levels increase while survivability decreases as temperature rises across Drosophila species.” 2014. Web. 14 Apr 2021.
Vancouver:
Ricketti DA. Energy levels increase while survivability decreases as temperature rises across Drosophila species. [Internet] [Masters thesis]. Rutgers University; 2014. [cited 2021 Apr 14].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/43555/.
Council of Science Editors:
Ricketti DA. Energy levels increase while survivability decreases as temperature rises across Drosophila species. [Masters Thesis]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/43555/
3.
Sawalha, Mohammed Sa.
Development of adhesive test for hot-poured crack sealants.
Degree: MS, Civil Engineering, 2016, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/90692
► Sealants may be defined as the flexible materials used in cracks and/or joints preventing moisture infiltration into the pavements. These materials should acquire certain adhesive…
(more)
▼ Sealants may be defined as the flexible materials used in cracks and/or joints preventing moisture infiltration into the pavements. These materials should acquire certain adhesive and cohesive properties to remain intact in the cracks and/or joints. Hot-poured applied crack sealants are one of the most common preventive techniques in North America that extend pavement life. However, most of these applied sealants fail due to their poor
adhesion to crack walls. Various tests are currently used to measure the sealants’ adhesive properties. Most of these tests apply a mechanical load (tensile, shear, bending, torsion, and peeling) or study the chemistry at the interfaces, especially the molecular and interatomic forces generated at the interfaces. These tests, however, either lack a real correlation with field performance or have not yet been validated. This study introduces the development of a procedure for an adhesive prediction test, tensile adhesive method (TAM). It also evaluates the feasibility of two other tests: the single end notch interface (SENI) test and sessile drop method (SDM). TAM test, which is a modified version of the current crack sealant
adhesion tester (CSAT) test, shows consistent results among specimens and users. In addition, it was successful in capturing the
effect of
temperature changes and aging effects. It is concluded that good adhesive properties of hot-poured crack sealant are required for desired field performance, which can be predicted from lab-aged specimen test results. However, other factors affecting sealant performance should be considered, including sealant installation, stiffness, and other preventive maintenance applied to the pavement.
Advisors/Committee Members: Al-Qadi, Imad (advisor), Ozer, Hasan (committee member).
Subjects/Keywords: Adhesion; Tensile adhesive method (TAM); Adhesive Tests; Temperature Effect on Adhesion; Aging Effect on Adhesion; Adhesive Mechanisms
…theory rests on defining the electrostatic forces an
effect, not a cause, of good adhesion… …The remaining sealants (Fb, Ad) did not show any effect of temperature changes on… …x29;.
Two temperatures are used to investigate the effect of temperature changes on… …poured crack sealants,
including one on adhesion: A crack sealant adhesion test (CSAT)… …detect the effect of aging and temperature variations. Other
candidate tests were also…
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APA (6th Edition):
Sawalha, M. S. (2016). Development of adhesive test for hot-poured crack sealants. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/90692
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):
Sawalha, Mohammed Sa. “Development of adhesive test for hot-poured crack sealants.” 2016. Thesis, University of Illinois – Urbana-Champaign. Accessed April 14, 2021.
http://hdl.handle.net/2142/90692.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sawalha, Mohammed Sa. “Development of adhesive test for hot-poured crack sealants.” 2016. Web. 14 Apr 2021.
Vancouver:
Sawalha MS. Development of adhesive test for hot-poured crack sealants. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2016. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/2142/90692.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sawalha MS. Development of adhesive test for hot-poured crack sealants. [Thesis]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/90692
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Portland State University
4.
Alla, Victoria Martin.
High Mobility Group Protein 1 (HMGB1) And Its Role As A Global Transcription Regulator In Response To Temperature Fluctuations In The Annual Killifish Austrofundulus limnaeus.
Degree: MS(M.S.) in Biology, Biology, 2011, Portland State University
URL: https://pdxscholar.library.pdx.edu/open_access_etds/239
► As a study organism, annual killifish (Austrofundulus limnaeus) provide a well suited study system for examining the effects of environmental temperature fluctuations at the…
(more)
▼ As a study organism, annual killifish (Austrofundulus limnaeus) provide a well suited study system for examining the effects of environmental
temperature fluctuations at the cellular level. A. limnaeus persist in the harsh high desert climate of the Maracaibo Basin, Venezuela where they live in small, ephemeral freshwater pools. Temperatures in these waters can vary as much as 20 degrees C daily and reach maximums of over 40 degrees C due to the semi-arid climate. Previous cDNA microarray studies on killifish revealed the mRNA pattern for High Mobility Group Protein 1 (HMGB1) to be strongly affected by
temperature perturbations. Specifically, peaks in hmgb1 transcript abundance were negatively correlated with
temperature during
temperature cycling, and experienced over a 10 fold difference in expression in response to the
temperature cycle. Using the same
temperature cycling experimental setup, this study's aim was three-fold: (1) to characterize the total amount of HMGB1 protein in adult male killifish livers, (2) to describe the subcellular localization of the HMGB1 protein in adult male killifish livers and (3) to sequence the 5' upstream region of the hmgb1 gene to identify possible stress responsive elements. We detected no significant difference in total HMGB1 protein levels as a consequence of
temperature cycling. The data for subcellular localization of HGMB1 protein do not support a strong change in subcellular localization of the protein in response to
temperature cycling; most of the HMGB1 protein is found in the cytoplasmic compartment in liver tissue. Although overall patterns of subcellular localization did not change significantly, we found a significant difference between nuclear HMGB1 protein levels in
temperature cycled fish versus control (constant
temperature) fish. This could suggest a muting of the natural translocation of HMGB1 into the nucleus observed in control fish at around 9:00 at night. Finally, the upstream region of the hgmb1 gene does reveal a number of putative stress responsive transcription factor binding sites.
Advisors/Committee Members: Jason Podrabsky.
Subjects/Keywords: Killifishes – Effect of temperature on; Proteins
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APA (6th Edition):
Alla, V. M. (2011). High Mobility Group Protein 1 (HMGB1) And Its Role As A Global Transcription Regulator In Response To Temperature Fluctuations In The Annual Killifish Austrofundulus limnaeus. (Masters Thesis). Portland State University. Retrieved from https://pdxscholar.library.pdx.edu/open_access_etds/239
Chicago Manual of Style (16th Edition):
Alla, Victoria Martin. “High Mobility Group Protein 1 (HMGB1) And Its Role As A Global Transcription Regulator In Response To Temperature Fluctuations In The Annual Killifish Austrofundulus limnaeus.” 2011. Masters Thesis, Portland State University. Accessed April 14, 2021.
https://pdxscholar.library.pdx.edu/open_access_etds/239.
MLA Handbook (7th Edition):
Alla, Victoria Martin. “High Mobility Group Protein 1 (HMGB1) And Its Role As A Global Transcription Regulator In Response To Temperature Fluctuations In The Annual Killifish Austrofundulus limnaeus.” 2011. Web. 14 Apr 2021.
Vancouver:
Alla VM. High Mobility Group Protein 1 (HMGB1) And Its Role As A Global Transcription Regulator In Response To Temperature Fluctuations In The Annual Killifish Austrofundulus limnaeus. [Internet] [Masters thesis]. Portland State University; 2011. [cited 2021 Apr 14].
Available from: https://pdxscholar.library.pdx.edu/open_access_etds/239.
Council of Science Editors:
Alla VM. High Mobility Group Protein 1 (HMGB1) And Its Role As A Global Transcription Regulator In Response To Temperature Fluctuations In The Annual Killifish Austrofundulus limnaeus. [Masters Thesis]. Portland State University; 2011. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/239
Massey University
5.
Béchet, Quentin.
Modelling the impact of temperature on microalgae productivity during outdoor cultivation.
Degree: PhD, Environmental Engineering, 2014, Massey University
URL: http://hdl.handle.net/10179/5806
► Accurate predictions of algal productivity during outdoor cultivation are critically needed to assess the economic feasibility and the environmental impacts of full-scale algal cultivation. The…
(more)
▼ Accurate predictions of algal productivity during outdoor cultivation are critically needed to
assess the economic feasibility and the environmental impacts of full-scale algal cultivation.
The literature shows that current estimations of full-scale productivities are mainly based on
experimental data obtained during lab-scale experiments conducted under conditions poorly
representative of outdoor conditions. In particular, the effect of temperature variations on
algal productivity is often neglected. The main objective of this thesis was to develop a model
able to predict algal productivity under the dynamic conditions of temperature and light
representative of full-scale cultivation. In a first step, models were developed to predict broth
temperature as a function of climatic, operational, and design parameters. The model
developed for open ponds could predict temperature at an accuracy of ±2.6 °C when assessed
against experimental data collected in New Zealand over one year. The temperature model
developed for closed photobioreactors was accurate at ±4.3 °C when compared to
experimental data collected in Singapore and New Zealand over a total of 6 months of
cultivation. This second temperature model was then applied at different climatic locations to
demonstrate that actively controlling temperature would seriously threaten the economics and
sustainability of full-scale cultivation in photobioreactors.
To quantify the impact of temperature variations on biomass productivity, a productivity
model was developed using Chlorella vulgaris as a representative commercial species. To
determine the best methodology, a review of more than 40 models described in the literature
revealed that an approach accounting for light gradients combined with an empirical function
of temperature for photosynthesis and first-order kinetics for respiration would offer the most
pragmatic compromise between accuracy and complexity. The model was parameterized
using short-term indoor experiments and subsequently validated using independent benchscale
indoor (> 160 days) and pilot-scale outdoor (> 140 days) experiments, showing
prediction accuracies of ± 13%. The outdoor data set was obtained from 13 different
experiments performed in 4 different reactors operated under various regimes and climatic
conditions. The productivity model was found to be accurate enough to significantly refine
previous assessments of the economics and the environmental impacts of full-scale algal
cultivation.
The productivity model was then used in different case studies in order to investigate the
impact of location/climate, design (pond depth or reactor diameter), and operation (hydraulic
retention time or HRT) on productivity and water demand. Although the qualitative impact of
the HRT on process was already known, this application enabled the first quantification of the
HRT value on the productivity. Low HRT values around 3 days were found to maximize
productivity at most locations investigated but these operating conditions were…
Subjects/Keywords: Algae culture;
Microalgae;
Effect of temperature on
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APA (6th Edition):
Béchet, Q. (2014). Modelling the impact of temperature on microalgae productivity during outdoor cultivation. (Doctoral Dissertation). Massey University. Retrieved from http://hdl.handle.net/10179/5806
Chicago Manual of Style (16th Edition):
Béchet, Quentin. “Modelling the impact of temperature on microalgae productivity during outdoor cultivation.” 2014. Doctoral Dissertation, Massey University. Accessed April 14, 2021.
http://hdl.handle.net/10179/5806.
MLA Handbook (7th Edition):
Béchet, Quentin. “Modelling the impact of temperature on microalgae productivity during outdoor cultivation.” 2014. Web. 14 Apr 2021.
Vancouver:
Béchet Q. Modelling the impact of temperature on microalgae productivity during outdoor cultivation. [Internet] [Doctoral dissertation]. Massey University; 2014. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10179/5806.
Council of Science Editors:
Béchet Q. Modelling the impact of temperature on microalgae productivity during outdoor cultivation. [Doctoral Dissertation]. Massey University; 2014. Available from: http://hdl.handle.net/10179/5806
Rutgers University
6.
Hozier, James.
The local adaptation of the circadian clock's temperature compensation in Neurospora.
Degree: MS, Biology, 2014, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/43541/
► In the current study, we have tested the hypothesis that temperature compensation (TC) of the circadian clock plays a role in local adaptation. To test…
(more)
▼ In the current study, we have tested the hypothesis that
temperature compensation (TC) of the circadian clock plays a role in local adaptation. To test this hypothesis, we chose strains of Neurospora collected from different latitudes; Alaska (high) and Ivory Coast (low). To examine the molecular oscillator of these selected strains, we transformed the natural strains with a translational luciferase reporter of the key clock gene FREQUENCY (FRQ). To examine the developmental overt rhythm, we used the inverted race tube assay. Q10 values of the molecular periods and the developmental periods of each strain have been calculated, and used as a quantitative measure of TC. Our data suggest that the molecular oscillators of natural strains collected from different latitudes do not differ from one another, and their Q10 values are relatively similar to each other. However, we found that the developmental overt rhythms have different period and Q10 values and a period among the strains studied. The periods and Q10 values of developmental rhythm are also more variable when compared to those of the molecular rhythm. Taken our results together, we concluded that 1) TC plays a role in adaptation, 2) the adaptation occurred at either the output of the clock or at the coupling mechanism between the oscillator, and 3) the adaptation occurred at the developmental rhythm rather than the molecular oscillator
Advisors/Committee Members: Lee, Kwangwon (chair), Nam, Jongmin (internal member), Lun, Desmond (internal member).
Subjects/Keywords: Circadian rhythms; Neurospora – Effect of temperature on
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APA (6th Edition):
Hozier, J. (2014). The local adaptation of the circadian clock's temperature compensation in Neurospora. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/43541/
Chicago Manual of Style (16th Edition):
Hozier, James. “The local adaptation of the circadian clock's temperature compensation in Neurospora.” 2014. Masters Thesis, Rutgers University. Accessed April 14, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/43541/.
MLA Handbook (7th Edition):
Hozier, James. “The local adaptation of the circadian clock's temperature compensation in Neurospora.” 2014. Web. 14 Apr 2021.
Vancouver:
Hozier J. The local adaptation of the circadian clock's temperature compensation in Neurospora. [Internet] [Masters thesis]. Rutgers University; 2014. [cited 2021 Apr 14].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/43541/.
Council of Science Editors:
Hozier J. The local adaptation of the circadian clock's temperature compensation in Neurospora. [Masters Thesis]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/43541/
University of New Mexico
7.
Weber, Paula Danielle.
The effects of temperature forcing on dengue dynamics via the extrinsic incubation period.
Degree: Mathematics & Statistics, 2012, University of New Mexico
URL: http://hdl.handle.net/1928/20153
► Dengue fever is a mosquito-transmitted disease that is endemic in many parts of the tropical world and affects a significant proportion of the human population.…
(more)
▼ Dengue fever is a mosquito-transmitted disease that is endemic in many parts of the tropical world and affects a significant proportion of the human population.
Temperature is known to influence aspects of the dengue transmission cycle, which has consequences for disease dynamics. Previous work has explored the effects of
temperature on the mortality rate of the mosquito and the resulting population change. However, there is substantial evidence that the extrinsic incubation period (EIP) of the pathogen within the vector host, Aedes aegypti, is also
temperature dependent. This dependence has not been thoroughly researched. We present a single serotype compartmental model with a gamma-distributed exposed vector class to account for a
temperature-dependent EIP. Where appropriate,
temperature-dependent vector mortality is convolved with the
temperature dependent EIP using the mortality function presented by Yang et al. [49]. Both seasonal and diurnal
temperature changes are examined for their potential effects upon dengue persistence. The mean and range of
temperature fluctuations that facilitate persistence are presented based upon the EIP function, initial conditions, seasonal
temperature forcing with and without vector mortality, as well as seasonal and diurnal
temperature forcing with and without vector mortality. With seasonal forcing and
temperature dependence only in the EIP, all simulations with mean temperatures above 26 C show persistence. However, if vector mortality is also variable, persistence is no longer possible in higher temperatures with higher
temperature ranges. Diurnal forcing exacerbates this
effect limiting persistence to mean temperatures of 23 C to 34 C with variable
temperature ranges. It is clear that more data are needed to reduce the uncertainty in estimating the relationships between both EIP and vector mortality because these relationships can have large effects on disease dynamics. Additionally, this work demonstrates that when modeling
temperature-dependent effects, it is vital to not only include seasonal variation in
temperature but also diurnal variation.
Advisors/Committee Members: Wearing, Helen, Embid, Pedro, Nitsche, Monika.
Subjects/Keywords: Dengue – Environmental aspects; Dengue viruses – Effect of temperature on; Aedes aegypti – Effect of temperature on.
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APA (6th Edition):
Weber, P. D. (2012). The effects of temperature forcing on dengue dynamics via the extrinsic incubation period. (Masters Thesis). University of New Mexico. Retrieved from http://hdl.handle.net/1928/20153
Chicago Manual of Style (16th Edition):
Weber, Paula Danielle. “The effects of temperature forcing on dengue dynamics via the extrinsic incubation period.” 2012. Masters Thesis, University of New Mexico. Accessed April 14, 2021.
http://hdl.handle.net/1928/20153.
MLA Handbook (7th Edition):
Weber, Paula Danielle. “The effects of temperature forcing on dengue dynamics via the extrinsic incubation period.” 2012. Web. 14 Apr 2021.
Vancouver:
Weber PD. The effects of temperature forcing on dengue dynamics via the extrinsic incubation period. [Internet] [Masters thesis]. University of New Mexico; 2012. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1928/20153.
Council of Science Editors:
Weber PD. The effects of temperature forcing on dengue dynamics via the extrinsic incubation period. [Masters Thesis]. University of New Mexico; 2012. Available from: http://hdl.handle.net/1928/20153
Western Washington University
8.
Ponce-McDermott, Monica R.
Lipids of the sea anemone Anthopleura elegantissima: season and symbiont affect content and fractionation.
Degree: MS, Environmental Sciences, 2012, Western Washington University
URL: https://doi.org/10.25710/bkf7-sn42
;
https://cedar.wwu.edu/wwuet/245
► Anthopleura elegantissima, the common Pacific sea anemone, can host two very different algal endosymbionts: zooxanthellae (Symbiodinium muscatinei) and zoochlorellae (Elliptochloris marina). The photosynthetic carbon…
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▼ Anthopleura elegantissima, the common Pacific sea anemone, can host two very different algal endosymbionts: zooxanthellae (Symbiodinium muscatinei) and zoochlorellae (Elliptochloris marina). The photosynthetic carbon provided by the symbionts supplements the host's heterotrophic feeding, with zooxanthellae potentially translocating five times more carbon to the host than do zoochlorellae. We developed a method to measure lipid levels of zooxanthellate and zoochlorellate A. elegantissima in different seasons, focusing on non-polar lipids that are important components of gonad and gametes. In July 2009 and January 2010, zooxanthellate and zoochlorellate A. elegantissima were collected from the same habitat at the same tidal height. Non-polar lipids were extracted and separated into classes by thin layer chromatography. A semi-quantitative analysis of the chromatography plates allowed a determination of how lipid identity and quantity varied seasonally and by the symbiotic state of the anemone. Anemones collected in July were, on average, 41% larger than those collected in January. Total non-polar lipid content showed no significant seasonal pattern, but cholesterol and palmitic acid (a fatty acid) were present in greater proportions in all January anemones. Zooxanthellate anemones had significantly more non-polar lipid than zoochlorellate anemones in both seasons, and a significantly greater percentage of their lipid was composed of cholesterol and palmitic acid. The winter decrease in body mass likely resulted from increased rates of fission, metabolism of stored lipids, a decrease in food availability, and seasonally reduced translocation of photosynthetic products from the symbionts to their hosts. The reduction in symbiont-derived products may impact the ability of the host anemone to direct resources to development of gonad tissues. Zoochlorellae, which translocate less carbon to their hosts under most conditions, also appear to translocate different products. These differences would be magnified if A. elegantissima switch from zoochlorellate to zooxanthellate under the conditions of increasing
temperature predicted in global climate change scenarios. Whether these changes ultimately increase or decrease fitness and whether such changes will also be seen in other symbiotic cnidarians (e.g., corals), that switch symbionts under environmental stress, are important questions that deserve additional attention.
Advisors/Committee Members: Bingham, Brian L., 1960-, Sulkin, Stephen D., Prody, Gerry.
Subjects/Keywords: Marine Biology; Lipids; Zooxanthella – Effect of temperature on; Zooxanthella – Effect of light on; Symbiosis; Sea anemones – Effect of temperature on; Sea anemones – Effect of light on; masters theses
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APA (6th Edition):
Ponce-McDermott, M. R. (2012). Lipids of the sea anemone Anthopleura elegantissima: season and symbiont affect content and fractionation. (Masters Thesis). Western Washington University. Retrieved from https://doi.org/10.25710/bkf7-sn42 ; https://cedar.wwu.edu/wwuet/245
Chicago Manual of Style (16th Edition):
Ponce-McDermott, Monica R. “Lipids of the sea anemone Anthopleura elegantissima: season and symbiont affect content and fractionation.” 2012. Masters Thesis, Western Washington University. Accessed April 14, 2021.
https://doi.org/10.25710/bkf7-sn42 ; https://cedar.wwu.edu/wwuet/245.
MLA Handbook (7th Edition):
Ponce-McDermott, Monica R. “Lipids of the sea anemone Anthopleura elegantissima: season and symbiont affect content and fractionation.” 2012. Web. 14 Apr 2021.
Vancouver:
Ponce-McDermott MR. Lipids of the sea anemone Anthopleura elegantissima: season and symbiont affect content and fractionation. [Internet] [Masters thesis]. Western Washington University; 2012. [cited 2021 Apr 14].
Available from: https://doi.org/10.25710/bkf7-sn42 ; https://cedar.wwu.edu/wwuet/245.
Council of Science Editors:
Ponce-McDermott MR. Lipids of the sea anemone Anthopleura elegantissima: season and symbiont affect content and fractionation. [Masters Thesis]. Western Washington University; 2012. Available from: https://doi.org/10.25710/bkf7-sn42 ; https://cedar.wwu.edu/wwuet/245
Portland State University
9.
Palmer, Rachel Marie.
The Interactive Effect of Temperature and Salinity in the Nile Tilapia (<i>Oreochromis niloticus</i>).
Degree: MS(M.S.) in Biology, Biology, 2019, Portland State University
URL: https://pdxscholar.library.pdx.edu/open_access_etds/4940
► Frequent measures that aim to identify the tolerance of an organism to various environmental conditions rely on the mortality of said organism. However, the…
(more)
▼ Frequent measures that aim to identify the tolerance of an organism to various environmental conditions rely on the mortality of said organism. However, the effects of sub-lethal stress can be just as important to consider as they may give rise to how an organism may live in such an environment (growth, reproduction, etc.). Coping with changes in environmental conditions can have a high energy cost. Even starting a cellular stress response alone has proven to be costly. It is therefore reasonable that organisms in stressful situations will dedicate energy sources to survival mechanisms, and downregulate non-necessary activities like growth, and reproduction.
As a tropical freshwater species, Nile Tilapia are
subject to both Winter Stress Syndrome and saltwater intrusion as global climate change progresses, making them an ideal model organism. In order to test the physiological limits of this species, we exposed Nile Tilapia to a variety of treatments (two temperatures: 21°C & 14°C, three salinities: 0ppt, 16ppt, 34ppt) for one hour. By manipulating both
temperature and salinity simultaneously the author hopes to shed light on the future of this species as global climate change progresses.
Cell cycle arrest can occur at cellular checkpoints such as the ones located at G1 or G2/M. Monitoring the DNA replication process is crucial to cellular activities, and disruptions such a cell size issues or DNA damage can cause this process to stop indicating the presence of sub-lethal stress. There were no significant changes in the proportions of cells in G1, S, or G2 due to an increase of salinity in warm water. In cold water, there was a steady decrease of the percentage of cells in G1 as salinity increased suggesting cell cycle arrest is occurring at a different checkpoint. A significant increase in the number of cells in G2 in response to cold
temperature was found, however, this
effect was not made greater by the addition of salinity. Increasing number of cells in G2/M suggests that there is cell cycle arrest occurring at the G2/M checkpoint.
The concentrations of three proteins involved in the regulation and arrest of the cell cycle were measured in gill tissue by dot blotting. Western blotting was performed to ensure the specificity of the protein antibodies. Three proteins of interest were chosen due to their roles in regulating cell cycle proliferation (Proliferating Cell Nuclear Antigen), growth arrest (Growth Arrest and DNA Damage-45) and programmed cell death (p53).
Proliferating Cell Nuclear Antigen (PCNA), Gadd45, p53 all showed significant decreases in concentration in gill tissue exposed to saltwater (34 ppt) in the warm
temperature treatment. There was no significant
effect of salinity within the cold
temperature treatment for any of the proteins tested.
The CCAAT/Enhancer-binding proteins (C/EBP) are a class of transcription factors that act upon cellular proliferation and differentiation. C/EBP-𝛿 is the specific protein that is activated in response to stress stimuli.…
Advisors/Committee Members: Bradley A. Buckley.
Subjects/Keywords: Nile tilapia – Effect of temperature on; Nile tilapia – Effect of salt on; Cell cycle; Biology
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APA (6th Edition):
Palmer, R. M. (2019). The Interactive Effect of Temperature and Salinity in the Nile Tilapia (<i>Oreochromis niloticus</i>). (Masters Thesis). Portland State University. Retrieved from https://pdxscholar.library.pdx.edu/open_access_etds/4940
Chicago Manual of Style (16th Edition):
Palmer, Rachel Marie. “The Interactive Effect of Temperature and Salinity in the Nile Tilapia (<i>Oreochromis niloticus</i>).” 2019. Masters Thesis, Portland State University. Accessed April 14, 2021.
https://pdxscholar.library.pdx.edu/open_access_etds/4940.
MLA Handbook (7th Edition):
Palmer, Rachel Marie. “The Interactive Effect of Temperature and Salinity in the Nile Tilapia (<i>Oreochromis niloticus</i>).” 2019. Web. 14 Apr 2021.
Vancouver:
Palmer RM. The Interactive Effect of Temperature and Salinity in the Nile Tilapia (<i>Oreochromis niloticus</i>). [Internet] [Masters thesis]. Portland State University; 2019. [cited 2021 Apr 14].
Available from: https://pdxscholar.library.pdx.edu/open_access_etds/4940.
Council of Science Editors:
Palmer RM. The Interactive Effect of Temperature and Salinity in the Nile Tilapia (<i>Oreochromis niloticus</i>). [Masters Thesis]. Portland State University; 2019. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/4940
Massey University
10.
Sheridan, Rachael Elizabeth.
Environmental and genetic influences on growth, flowering, and nectar production in mānuka (Leptospermum scoparium J.R. Forst. & G. Forst.) : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Science, School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
.
Degree: 2019, Massey University
URL: http://hdl.handle.net/10179/15710
► Dihydroxyacetone (DHA) in floral nectar of the Mānuka shrub, Leptospermum scoparium (J.R. & G. Forst.) is a direct precursor to methylglyoxal (MGO) the bioactive compound…
(more)
▼ Dihydroxyacetone (DHA) in floral nectar of the Mānuka shrub, Leptospermum
scoparium (J.R. & G. Forst.) is a direct precursor to methylglyoxal (MGO) the bioactive
compound of manuka honey. Accumulation of DHA in Mānuka nectars varies between
trees, localities, and years. However, the reasons for this variability are largely
unknown and its origins in nectar are unclear. Since high DHA to total sugar ratios
(DHA/TSugar) in fresh honey result in high MGO in mature honey, it follows that
nectars with high DHA/TSugar will produce high-value honey indicated by a high
Unique Mānuka Factor (UMF®) attracting premium returns for the NZ honey industry
and NZ economy. It is key to further optimise both nectar and DHA production by
selecting for high producers. Selecting/developing varieties for maximum nectar
potential (NP) needs an understanding of the relative influences of genotype (G),
environment (E), and their interactions (GEI) on relevant trait expression. The
responses of genetic clones from three high yielding Mānuka lines expressing varying
levels of nectar DHA to temperature, light, and soil moisture were studied in controlled
environments. The relative performances of the clones were evaluated and
contributions of G, E, and GEI to aspects of their growth, flowering and nectar
production quantified. – Shortened abstract
Subjects/Keywords: Leptospermum scoparium;
Effect of temperature on;
Effect of light on;
Effect of soil moisture on;
Genetics;
Growth;
Flowering;
Nectar
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APA (6th Edition):
Sheridan, R. E. (2019). Environmental and genetic influences on growth, flowering, and nectar production in mānuka (Leptospermum scoparium J.R. Forst. & G. Forst.) : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Science, School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
. (Thesis). Massey University. Retrieved from http://hdl.handle.net/10179/15710
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):
Sheridan, Rachael Elizabeth. “Environmental and genetic influences on growth, flowering, and nectar production in mānuka (Leptospermum scoparium J.R. Forst. & G. Forst.) : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Science, School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
.” 2019. Thesis, Massey University. Accessed April 14, 2021.
http://hdl.handle.net/10179/15710.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sheridan, Rachael Elizabeth. “Environmental and genetic influences on growth, flowering, and nectar production in mānuka (Leptospermum scoparium J.R. Forst. & G. Forst.) : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Science, School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
.” 2019. Web. 14 Apr 2021.
Vancouver:
Sheridan RE. Environmental and genetic influences on growth, flowering, and nectar production in mānuka (Leptospermum scoparium J.R. Forst. & G. Forst.) : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Science, School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
. [Internet] [Thesis]. Massey University; 2019. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10179/15710.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sheridan RE. Environmental and genetic influences on growth, flowering, and nectar production in mānuka (Leptospermum scoparium J.R. Forst. & G. Forst.) : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Science, School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
. [Thesis]. Massey University; 2019. Available from: http://hdl.handle.net/10179/15710
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Western Washington University
11.
Woodhouse, Gemma S. (Gemma Smith).
Influence of temperature on the physiological performance of zoochlorellae in two intertidal hosts (Anthopleura elegantissima and A. xanthogrammica).
Degree: MS, Environmental Sciences, 2014, Western Washington University
URL: https://doi.org/10.25710/hrp9-6n23
;
https://cedar.wwu.edu/wwuet/361
► The ability of a symbiotic organism to tolerate and respond to stress is dependent on a complex integration of the physiological processes of both…
(more)
▼ The ability of a symbiotic organism to tolerate and respond to stress is dependent on a complex integration of the physiological processes of both host and symbiont. In the intertidal zone, where organisms are exposed to numerous environmental stressors, physiological tolerance limits of algae and animals are often within 1°C - 3°C of the body temperatures they experience there. To understand the association between intertidal sea anemones and their photosymbionts, and how these associations may change with increasing climatic stress, I examined two spatially dominant species in the genus Anthopleura (A. elegantissima and A. xanthogrammica) in symbiotic associations with their relatively sensitive chlorophyte photosymbiont, Elliptochloris marina. Anemones hosting E. marina were exposed to an increasing thermal regime from 10 - 28°C, under two light treatments, over the course of 10 weeks to establish the upper thermal tolerance limit of E. marina in each host, while examining the response of the anemones themselves to the thermal stress. Of the two hosts, A. xanthogrammica was less tolerant of high temperatures. A contraction response was triggered for A. xanthogrammica at temperatures above 18°C, but A. elegantissima showed no contraction until temperatures reached 24°C. To determine how the E. marina were responding to the
temperature increases, I examined the photochemical efficiency of PS II by measuring photosynthetic efficiency (Fv/Fm) and photosynthetic capacity (rETRmax) of symbionts within each anemone host at each
temperature interval. Photochemical efficiency was strongly affected by
temperature; however, there were no apparent host-specific differences. From 10 - 22°C, Fv/Fm remained stable, averaging 0.6 ± 0.1 (SD) for both species. At temperatures above 22°C, photochemical efficiency steadily declined, indicating photoinhibition and the upper thermal tolerance limit of E. marina. This relatively low thermal tolerance may influence the competitive balance of symbionts under conditions of increasing global temperatures. Increasing temperatures may cause anemones to adaptively expel symbionts to switch to a more tolerant species. In this study, both A. elegantissima and A. xanthogrammica expelled symbionts as the temperatures rose. By 28°C, both Anthopleura species had expelled the majority of their symbionts; however, A. xanthogrammica was able to retain a higher percentage (A. elegantissima: 96.7 ± 4.6 % loss; A. xanthogrammica: 84.0 ± 18.1 % loss), indicating that they may have an increased ability to buffer
temperature changes and maintain algal symbioses during prolonged periods of high temperatures. Field measurements of the internal body temperatures of A. xanthogrammica indicated that the anemone has a moderate ability to buffer its symbionts from thermal stress, as the internal body temperatures of lower intertidal anemones remained 6.2 ± 1.1°C cooler than ambient temperatures. This ability to moderate the internal
temperature is likely due to host-specific morphological traits, such as a large…
Advisors/Committee Members: Bingham, Brian L., 1960-, Matthews, Robin A., 1952-, Donovan, Deborah Anne, 1964-.
Subjects/Keywords: Marine Biology; Green algae – Effect of temperature on; Anthopleura – Effect of temperature on; Symbiosis; masters theses
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APA (6th Edition):
Woodhouse, G. S. (. S. (2014). Influence of temperature on the physiological performance of zoochlorellae in two intertidal hosts (Anthopleura elegantissima and A. xanthogrammica). (Masters Thesis). Western Washington University. Retrieved from https://doi.org/10.25710/hrp9-6n23 ; https://cedar.wwu.edu/wwuet/361
Chicago Manual of Style (16th Edition):
Woodhouse, Gemma S (Gemma Smith). “Influence of temperature on the physiological performance of zoochlorellae in two intertidal hosts (Anthopleura elegantissima and A. xanthogrammica).” 2014. Masters Thesis, Western Washington University. Accessed April 14, 2021.
https://doi.org/10.25710/hrp9-6n23 ; https://cedar.wwu.edu/wwuet/361.
MLA Handbook (7th Edition):
Woodhouse, Gemma S (Gemma Smith). “Influence of temperature on the physiological performance of zoochlorellae in two intertidal hosts (Anthopleura elegantissima and A. xanthogrammica).” 2014. Web. 14 Apr 2021.
Vancouver:
Woodhouse GS(S. Influence of temperature on the physiological performance of zoochlorellae in two intertidal hosts (Anthopleura elegantissima and A. xanthogrammica). [Internet] [Masters thesis]. Western Washington University; 2014. [cited 2021 Apr 14].
Available from: https://doi.org/10.25710/hrp9-6n23 ; https://cedar.wwu.edu/wwuet/361.
Council of Science Editors:
Woodhouse GS(S. Influence of temperature on the physiological performance of zoochlorellae in two intertidal hosts (Anthopleura elegantissima and A. xanthogrammica). [Masters Thesis]. Western Washington University; 2014. Available from: https://doi.org/10.25710/hrp9-6n23 ; https://cedar.wwu.edu/wwuet/361
Portland State University
12.
Jordan, Meredith Powers.
The Effects of Anthropogenic Stressors on Mercury Concentrations and Community Composition of Freshwater Zooplankton.
Degree: MS(M.S.) in Environmental Science and Management, Environmental Science and Management, 2016, Portland State University
URL: https://pdxscholar.library.pdx.edu/open_access_etds/3364
► Methylmercury (MeHg) bioaccumulation in freshwater aquatic systems is impacted by anthropogenic stressors, including climate change and excess nutrients. The goal of this study was…
(more)
▼ Methylmercury (MeHg) bioaccumulation in freshwater aquatic systems is impacted by anthropogenic stressors, including climate change and excess nutrients. The goal of this study was to determine how warmer water temperatures and excess nutrients would impact zooplankton communities and phytoplankton concentrations, and in turn increase or decrease MeHg concentrations in freshwater zooplankton. I used a 2x2 factorial design to determine if the interaction of
temperature and nutrients would impact plankton metrics and zooplankton MeHg concentrations. Mesocosms were filled with Hg-contaminated water and plankton from Cottage Grove Reservoir, Oregon, a waterbody that has experienced decades of elevated MeHg concentrations and corresponding fish consumption advisories due to run-off from Black Butte Mine tailings, located within the watershed. Treatment combinations of warmer
temperature (increased by 0.5°C) and nutrient addition (a single pulse of excess nitrogen and phosphorous), control, and a combination of
temperature and nutrients were applied to mesocosms. While plankton did respond to treatments, zooplankton biomass and phytoplankton concentrations did not have significant relationships to MeHg concentrations. However, a significant interactive
effect of nutrients and
temperature was present: nutrients appeared to buffer against increased MeHg concentrations when
temperature was elevated. The mechanisms for this interaction appear to be related to a shift to larger body size and an increase in abundance of
Daphnia over copepods. Findings suggest that community composition and species-specific differences in both zooplankton and phytoplankton could play a role in MeHg transfer to higher trophic levels.
Advisors/Committee Members: Angela Strecker.
Subjects/Keywords: Bioaccumulation; Methylmercury; Zooplankton – Effect of temperature on; Phytoplankton – Effect of temperature on; Freshwater zooplankton; Nitrogen; Environmental Sciences
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APA (6th Edition):
Jordan, M. P. (2016). The Effects of Anthropogenic Stressors on Mercury Concentrations and Community Composition of Freshwater Zooplankton. (Masters Thesis). Portland State University. Retrieved from https://pdxscholar.library.pdx.edu/open_access_etds/3364
Chicago Manual of Style (16th Edition):
Jordan, Meredith Powers. “The Effects of Anthropogenic Stressors on Mercury Concentrations and Community Composition of Freshwater Zooplankton.” 2016. Masters Thesis, Portland State University. Accessed April 14, 2021.
https://pdxscholar.library.pdx.edu/open_access_etds/3364.
MLA Handbook (7th Edition):
Jordan, Meredith Powers. “The Effects of Anthropogenic Stressors on Mercury Concentrations and Community Composition of Freshwater Zooplankton.” 2016. Web. 14 Apr 2021.
Vancouver:
Jordan MP. The Effects of Anthropogenic Stressors on Mercury Concentrations and Community Composition of Freshwater Zooplankton. [Internet] [Masters thesis]. Portland State University; 2016. [cited 2021 Apr 14].
Available from: https://pdxscholar.library.pdx.edu/open_access_etds/3364.
Council of Science Editors:
Jordan MP. The Effects of Anthropogenic Stressors on Mercury Concentrations and Community Composition of Freshwater Zooplankton. [Masters Thesis]. Portland State University; 2016. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/3364
Stellenbosch University
13.
Inamahoro, Micheline.
Physiological dynamics of dormancy in apple buds grown in areas with insufficient winter chill.
Degree: PhD, Horticulture, 2020, Stellenbosch University
URL: http://hdl.handle.net/10019.1/107987
► ENGLISH ABSTRACT: Apple trees, that do not fulfil their winter chill requirement, undergo inadequate dormancy release resulting in poor budbreak with irregular and delayed flowering…
(more)
▼ ENGLISH ABSTRACT: Apple trees, that do not fulfil their winter chill requirement, undergo inadequate dormancy release resulting in poor budbreak with irregular and delayed flowering that impact negatively on fruit production and tree architecture. Under mild winter conditions, such as most production sites in the Western Cape region of South Africa, the application of chemical rest breaking agents is standard practise to artificially
release dormancy and synchronise budbreak in spring to ensure sustainable and profitable apple production. However, rest breaking chemicals can be harmful to the buds and may result in phytotoxic damage if not applied optimally, therefore a good understanding of the dormancy status of the buds is valuable and necessary to mitigate this risk when applying a rest breaking agent. Furthermore, little information is available on the physiological and biochemical dynamics of commercially produced apple buds when under these milder conditions and no information is known for the ‘Cripps Pink’ variety when grown under climatically contrasting South African conditions. The main aim of this study was to
investigate the
effect of inadequate winter chill and the application of a blend of hydrogen cyanamide
and mineral oil (HCo) as a rest breaking agent on the respiration rate and lipid composition of the
terminal buds of full bearing ‘Cripps Pink’ apple trees. Dormant apple buds from two climatic regions,
Elgin (insufficient winter chill) and the Koue Bokkeveld (sufficient winter chill) were compared in terms
of their respiration rate and lipid composition. Buds from the Elgin region were also tested and compared
after receiving a commercial HCo treatment at budswell. Shoots were excised and given a specified amount of artificial chill in the laboratory to act as a point of reference.
Apple buds exposed to sufficient chill (orchard and laboratory) showed an early dormancy entrance, high maximum dormancy level and an early release, while buds from the milder area generally showed
atypical dormancy behaviour. During winter, the total respiration rate and the rate of the main respiratory
pathways (tricarboxylic acid cycle (TCA) and cytochrome C (CYT)) were reduced with the decline in
temperature. Their levels increased again in the cold area at the beginning of spring to provide energy
for growth resumption. In contrast, the main respiration levels remained low in the warm area and the
pentose phosphate pathway (PPP) and alternative pathway (ALT) tested higher suggesting an attempt
by the plant to compensate for the deficiency in energy production. The HCo treatment induced hypoxia
in the buds and immediately decreased the total respiration as well as the main respiratory pathways (TCA and CYT). After this initial response the treated buds showed a significant increase in respiration
and reached high levels towards budbreak and green-tip stage. This increase was not observed in the
untreated buds from the mild winter climate, in contrast, these buds maintained a higher use of the PPP
…
Advisors/Committee Members: Louw, Esme Denise, Steyn, Wiehann J., Stellenbosch University. Faculty of AgriSciences. Dept. of Horticulture..
Subjects/Keywords: Apples – Dormancy – Climatic factors; Apples – Flowering; Apples – Development – Effect of temperature on; Buds – Effect of temperature on; Hydrocyanic acid; UCTD
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APA (6th Edition):
Inamahoro, M. (2020). Physiological dynamics of dormancy in apple buds grown in areas with insufficient winter chill. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/107987
Chicago Manual of Style (16th Edition):
Inamahoro, Micheline. “Physiological dynamics of dormancy in apple buds grown in areas with insufficient winter chill.” 2020. Doctoral Dissertation, Stellenbosch University. Accessed April 14, 2021.
http://hdl.handle.net/10019.1/107987.
MLA Handbook (7th Edition):
Inamahoro, Micheline. “Physiological dynamics of dormancy in apple buds grown in areas with insufficient winter chill.” 2020. Web. 14 Apr 2021.
Vancouver:
Inamahoro M. Physiological dynamics of dormancy in apple buds grown in areas with insufficient winter chill. [Internet] [Doctoral dissertation]. Stellenbosch University; 2020. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10019.1/107987.
Council of Science Editors:
Inamahoro M. Physiological dynamics of dormancy in apple buds grown in areas with insufficient winter chill. [Doctoral Dissertation]. Stellenbosch University; 2020. Available from: http://hdl.handle.net/10019.1/107987
14.
Theerasutthikul, Potjanee.
Investigating the main and interactive effects of vapour pressure deficit, soil water deficit, warmer temperatures and elevated CO2 on cotton growth and physiology.
Degree: M.Res., 2019, Western Sydney University
URL: http://hdl.handle.net/1959.7/uws:56616
► Climate change factors such as rising temperature, atmospheric carbon dioxide concentration [CO2] and increased drought frequency and intensity have been shown to affect cotton physiology…
(more)
▼ Climate change factors such as rising temperature, atmospheric carbon dioxide concentration [CO2] and increased drought frequency and intensity have been shown to affect cotton physiology and productivity. To investigate the effect of climate change on cotton, we divided our study into two parts, of which the first study focused on the effect of vapour pressure deficit (VPD) and soil water deficit (SWD) on stomatal response and the second study focused on the effect of increased temperature (TE) and elevated [CO2] (CE) on cotton growth and physiology. We conducted both experiments in an environmentally controlled glasshouse to imitate the projected drier, warmer and increased [CO2] conditions. Our goal was to use cotton to improve the understanding of the physiological and growth response of C3 crops to changing climate. Our study expands the understanding of how VPD affected plant physiology by separating temperature and RH and whether SWD has a role in altering this relationship. We found that rising VPD reduced gs, A and E. However, the key finding of this study was that SWD decreased gs and rising VPD exacerbated this reduction. We also found that SWD did not affect the relationship between VPD components and that each VPD component can affect plant physiology, either individually or combined. The results further indicated that the reduction in RH had a stronger effect on gs than temperature, regardless of soil water content. In addition, the stomatal model indicated that WUE in well-watered cotton was reduced at high temperature at given VPD levels. The SWD treatment did not alter plant hydraulic status, but significantly reduced height and number of nodes. This type of study should be further investigated as it has the potential to further our understanding of crop adaptation to drier and warmer climates, particularly in dry-land irrigation cotton farming systems.
Advisors/Committee Members: Western Sydney University. Hawkesbury Institute for the Environment (Host institution).
Subjects/Keywords: cotton; physiology; climatic factors; effect of atmospheric carbon dioxide on; effect of temperature on; effect of drought on; effect of soil moisture on
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APA (6th Edition):
Theerasutthikul, P. (2019). Investigating the main and interactive effects of vapour pressure deficit, soil water deficit, warmer temperatures and elevated CO2 on cotton growth and physiology. (Masters Thesis). Western Sydney University. Retrieved from http://hdl.handle.net/1959.7/uws:56616
Chicago Manual of Style (16th Edition):
Theerasutthikul, Potjanee. “Investigating the main and interactive effects of vapour pressure deficit, soil water deficit, warmer temperatures and elevated CO2 on cotton growth and physiology.” 2019. Masters Thesis, Western Sydney University. Accessed April 14, 2021.
http://hdl.handle.net/1959.7/uws:56616.
MLA Handbook (7th Edition):
Theerasutthikul, Potjanee. “Investigating the main and interactive effects of vapour pressure deficit, soil water deficit, warmer temperatures and elevated CO2 on cotton growth and physiology.” 2019. Web. 14 Apr 2021.
Vancouver:
Theerasutthikul P. Investigating the main and interactive effects of vapour pressure deficit, soil water deficit, warmer temperatures and elevated CO2 on cotton growth and physiology. [Internet] [Masters thesis]. Western Sydney University; 2019. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1959.7/uws:56616.
Council of Science Editors:
Theerasutthikul P. Investigating the main and interactive effects of vapour pressure deficit, soil water deficit, warmer temperatures and elevated CO2 on cotton growth and physiology. [Masters Thesis]. Western Sydney University; 2019. Available from: http://hdl.handle.net/1959.7/uws:56616
Michigan State University
15.
Lee, Chin-Mei.
Transcriptional regulation of cold acclimation in Arabidopsis thaliana.
Degree: 2012, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:1309
► Thesis Ph. D. Michigan State University, Biochemistry and Molecular Biology 2012.
Low temperature is a major environmental factor that affects the yield and quality of…
(more)
▼ Thesis Ph. D. Michigan State University, Biochemistry and Molecular Biology 2012.
Low temperature is a major environmental factor that affects the yield and quality of food and bioenergy crop plants. To cope with low temperature stress, many plants can acquire freezing tolerance through cold acclimation, in which remodeling of the metabolome and biological pathways leads to physiological adaptation to low temperatures. Many of these adjustments are brought about by intensively reconfiguring the expression of cold-regulated (COR) genes during cold acclimation. Some of the COR genes are regulated by the well-studied CBF pathway and its parallel ZAT12 pathway. However, the regulation and functions of other CBF-independent pathways that are involved in COR gene regulation are not well understood. Freezing tolerance in plants is affected by external signals as well as the growth conditions of plants themselves, but cross talk between cold and other signals has not been fully elucidated. The goal of this dissertation is to understand how freezing tolerance is established during cold acclimation in plants by addressing two key questions: first, how do plants perceive and integrate photoperiod as seasonal signals to modulate the expression of COR genes and subsequent freezing tolerance; second, what are the CBF-independent pathways that have major roles in COR gene expression and their roles in tolerance to low temperatures?In the first part of the dissertation, the photoperiodic regulation of the cold-responsive CBF pathway and freezing tolerance was demonstrated in Arabidopsis. The CBF transcript levels in short-day (SD) plants were higher than in long-day (LD) plants. Genetic analysis indicated that phytochrome B (PHYB) functions with two phytochrome interacting factors, PIF4 and PIF7, to down-regulate the CBF pathway and freezing tolerance under LD conditions. Down-regulation of the CBF pathway in LD plants correlated with higher PIF4 and PIF7 transcript levels and greater stability of the PIF4 and PIF7 proteins under LD conditions. These findings provide a mechanism of how plants sense and integrate photoperiod as seasonal signals to regulate cold responsive pathways and freezing tolerance. To address the second question, fifteen early cold-induced transcription factors (TF) sharing similar cold-induction kinetics with CBFs and ZAT12 were identified as regulators of CBF-independent pathways in parallel with the CBF and ZAT12 pathways. These TFs regulate about 29% of the COR genes; they regulate different sets of COR genes but with substantial overlap, which indicates that highly co-regulation of COR genes exists. Functional enrichment analysis of the COR genes regulated by each TF indicated that they are involved in diverse but overlapping biological pathways during cold acclimation. My results shed light on the regulation of COR genes by CBF-independent pathways and also on interactions between different biological pathways in cold acclimation. In summary, this dissertation provides substantial contributions to the…
Advisors/Committee Members: Thomashow, Michael F, Arnosti, David N, Kuo, Min-Hao, Triezenberg, Steven J, Howe, Gregg A.
Subjects/Keywords: Arabidopsis thaliana – Effect of temperature on; Plants – Effect of cold on; Cold – Physiological effect; Genetic regulation; Plant biology; Systematic biology
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APA (6th Edition):
Lee, C. (2012). Transcriptional regulation of cold acclimation in Arabidopsis thaliana. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:1309
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):
Lee, Chin-Mei. “Transcriptional regulation of cold acclimation in Arabidopsis thaliana.” 2012. Thesis, Michigan State University. Accessed April 14, 2021.
http://etd.lib.msu.edu/islandora/object/etd:1309.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lee, Chin-Mei. “Transcriptional regulation of cold acclimation in Arabidopsis thaliana.” 2012. Web. 14 Apr 2021.
Vancouver:
Lee C. Transcriptional regulation of cold acclimation in Arabidopsis thaliana. [Internet] [Thesis]. Michigan State University; 2012. [cited 2021 Apr 14].
Available from: http://etd.lib.msu.edu/islandora/object/etd:1309.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lee C. Transcriptional regulation of cold acclimation in Arabidopsis thaliana. [Thesis]. Michigan State University; 2012. Available from: http://etd.lib.msu.edu/islandora/object/etd:1309
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
16.
Bancroft, Morgan P.
An experimental investigation of the effects of temperature and dissolved oxygen on the growth of juvenile English sole and juvenile Dungeness crab.
Degree: MS, Marine Resource Management, 2015, Oregon State University
URL: http://hdl.handle.net/1957/55701
► In the past two decades, occurrences of summertime upwelling-driven low dissolved oxygen (DO) events, or hypoxia, have increased along the northeast Pacific coast. If hypoxic…
(more)
▼ In the past two decades, occurrences of summertime upwelling-driven low dissolved oxygen (DO) events, or hypoxia, have increased along the northeast Pacific coast. If hypoxic events are severe enough to cause marine species mortality, the areas affected are often called "dead zones." In 2002 and again in 2006, the events were lethal, resulting in mass invertebrate and fish kills. Many organisms are impacted by these events, but less mobile juvenile fishes and crabs are potentially more vulnerable to the long-term effects of these stressful conditions than adults. Little is known about how low DO impacts coastal fishes and invertebrates, especially during the juvenile phase. Nursery habitats in the nearshore open-coast and enclosed estuaries may be differentially affected by hypoxia by prevailing summertime oceanographic conditions. Both ecosystems are critical for the early development of many ecologically and commercially important species. While one habitat may be compromised by stressful environmental conditions, the other may provide refuge.
In upwelling driven areas, low dissolved oxygen is typically coupled with colder water, while in estuarine or semi-enclosed systems, dissolved oxygen diminishes with increasing temperatures.
Temperature and dissolved oxygen are known to have interactive effects on fish behavior and physiology, which underscores the importance of studying hypoxia within different systems and in relation to other co-occurring environmental variables. In order to isolate the effects of these parameters on growth, I conducted three experiments over the course of two years on juvenile Dungeness crab (Cancer magister) and English sole (Parophrys vetulus). During each experiment, I held English sole in the lab in fixed oxygen and
temperature conditions for at least thirty days, and Dungeness crab for approximately fifty. I tested a total of 15 oxygen and
temperature treatment combinations, with at least two replicates of each treatment. These treatments simulated summertime oceanographic conditions that are typically found in two nursery habitats used by these species: the Yaquina Bay estuary and Moolack Beach, Oregon USA.
English sole specific growth (g d⁻¹) increased with higher temperatures (13 and 15°C) and oxygen concentrations (2.0 and 6.0 mL L⁻¹) and was up to four times lower in all low
temperature and oxygen treatments (5 and 7°C; < 1.4 mL L⁻¹). Dungeness crab intermolt period decreased with
temperature from 48 days at 5°C to 12 days at 15°C. Crab specific growth (mm d⁻¹) increased with
temperature, with crabs in the highest temperatures growing nearly five times as much as crabs in the coldest temperatures.
Finally, if people have heard of hypoxia, it is commonly in relation to the condition found in the Gulf of Mexico, which is nutrient driven and can be traced to anthropogenic input. Instead, Oregon hypoxia is more difficult to trace directly to human-related activity, making West Coast hypoxia a relatively lesser understood occurrence. In order to share the results of my…
Advisors/Committee Members: Ciannelli, Lorenzo (advisor), Ryer, Clifford H. (committee member).
Subjects/Keywords: Hypoxia; Parophrys vetulus – Effect of temperature on – Pacific Coast (U.S.)
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APA (6th Edition):
Bancroft, M. P. (2015). An experimental investigation of the effects of temperature and dissolved oxygen on the growth of juvenile English sole and juvenile Dungeness crab. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/55701
Chicago Manual of Style (16th Edition):
Bancroft, Morgan P. “An experimental investigation of the effects of temperature and dissolved oxygen on the growth of juvenile English sole and juvenile Dungeness crab.” 2015. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/55701.
MLA Handbook (7th Edition):
Bancroft, Morgan P. “An experimental investigation of the effects of temperature and dissolved oxygen on the growth of juvenile English sole and juvenile Dungeness crab.” 2015. Web. 14 Apr 2021.
Vancouver:
Bancroft MP. An experimental investigation of the effects of temperature and dissolved oxygen on the growth of juvenile English sole and juvenile Dungeness crab. [Internet] [Masters thesis]. Oregon State University; 2015. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/55701.
Council of Science Editors:
Bancroft MP. An experimental investigation of the effects of temperature and dissolved oxygen on the growth of juvenile English sole and juvenile Dungeness crab. [Masters Thesis]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/55701
Oregon State University
17.
Cohen, Seth D.
Investigating the effects of temperature on secondary metabolism in Vitis vinifera L. cv. merlot berries.
Degree: PhD, Food Science and Technology, 2009, Oregon State University
URL: http://hdl.handle.net/1957/14104
► Grapes (e.g. Vitis vinifera L.) are one of the more important fruit crops from an economic standpoint with world market values over 550 million US…
(more)
▼ Grapes (e.g. Vitis vinifera L.) are one of the more important fruit crops from an economic standpoint with world market values over 550 million US dollars in 2007 and 2008, second to apples (United States Department of Agriculture). While a satisfactory level of ripeness is of primary concern, the quality of wine grapes is determined the contribution of secondary metabolites. econdary metabolites provide the color, aroma, flavor, and tactile sensations associated with wine and are believed to be of biological value to humans. Anthocyanins provide the color to red grapes and wine while flavonols are thought to provide color stability to wine through copigmentation with anthocyanins. Proanthocyanidins (PAs) provide astringency or a tactile response in the mouth, which is a primary element of wine quality. For the
plant, secondary metabolites are involved in signaling, seed dissemination, and protection against biotic and abiotic stresses.
In this work, the
temperature of field-grown grapes, Vitis vinifera L. cv. Merlot, was manipulated by cooling and heating berries relative to ambient temperatures during three growing seasons. A range of thermal time was investigated by delivering cold air during the day (Cool) or warm air at night (Heat).
Additionally, the
effect of reducing the diurnal
temperature range (DTR) was investigated by daytime cooling and nighttime heating without a significant change in the accumulated thermal time compared to ambient berries. The impact on PAs was studied by imposing treatments from fruit set to véraison during active PA
biosynthesis. Treatments imposed from véraison to harvest maturity (≥ 22.0°Brix) were intended to assess the impact on flavonol and anthocyanin accumulation and changes in PAs during ripening. In 2008, experiments focused on PA accumulation by examining metabolites and the expression of genes involved in PA biosynthesis at ten-day intervals up to véraison.
Treatment effects described here demonstrate a complex response of grape berries to shifts in temperatures. The data suggest periods of sensitivity with respect to secondary metabolism that may dictate the response to changes in temperatures.
To the authors’ knowledge, the data presented here is the first of it’s kind; examining the
effect of
temperature on active PA biosynthesis in both the skin and seed of grape as well as the
effect of altering the DTR of berries grown under field conditions. This research has implications in understanding fundamental plant responses to their environment and the impact of climate shifts and seasonal
temperature variations on grape berry composition.
Advisors/Committee Members: Kennedy, James (advisor), Bay, Brian (committee member).
Subjects/Keywords: Grapes; Thompson seedless grape – Effect of temperature on
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APA (6th Edition):
Cohen, S. D. (2009). Investigating the effects of temperature on secondary metabolism in Vitis vinifera L. cv. merlot berries. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/14104
Chicago Manual of Style (16th Edition):
Cohen, Seth D. “Investigating the effects of temperature on secondary metabolism in Vitis vinifera L. cv. merlot berries.” 2009. Doctoral Dissertation, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/14104.
MLA Handbook (7th Edition):
Cohen, Seth D. “Investigating the effects of temperature on secondary metabolism in Vitis vinifera L. cv. merlot berries.” 2009. Web. 14 Apr 2021.
Vancouver:
Cohen SD. Investigating the effects of temperature on secondary metabolism in Vitis vinifera L. cv. merlot berries. [Internet] [Doctoral dissertation]. Oregon State University; 2009. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/14104.
Council of Science Editors:
Cohen SD. Investigating the effects of temperature on secondary metabolism in Vitis vinifera L. cv. merlot berries. [Doctoral Dissertation]. Oregon State University; 2009. Available from: http://hdl.handle.net/1957/14104
Cape Peninsula University of Technology
18.
Basitere, Moses.
Desorption of lithium 7 isotope from a degraded amberlite lithiated mixed-bed-resin
.
Degree: 2011, Cape Peninsula University of Technology
URL: http://etd.cput.ac.za/handle/20.500.11838/2166
► Lithium 7 (⁷Li⁺) is an isotope, which is used in the nuclear industry as lithium hydroxide (⁷LiOH) for the chemical control (pH control) of the…
(more)
▼ Lithium 7 (⁷Li⁺) is an isotope, which is used in the nuclear industry as lithium hydroxide
(⁷LiOH) for the chemical control (pH control) of the high purity reactor coolant water process
in order to prevent corrosion in the Pressurised Water Reactor (PWR). Furthermore, the ⁷Li⁺
isotope is used in an ionic form in the nuclear grade cation ion-exchange resin. This resin is
used to purify the nuclear reactor coolant water by reducing cationic corrosion by-products
such as Cesium and Cobalt, which are generated from nuclear fission reactions. In view of
the fact that an inorganic salt of the isotope is used as an alkali sing agent in the PWR, the use
of lithiated resin prevents the removal of the ⁷Li⁺ isotope in the coolant water. As most users
of the nuclear grade resin purchase their resin in bulk, it follows that the resin has to be
evaluated in order to determine its usability. In certain cases, the resin may be considered
unusable as a result of the degradation caused by unsuitable transportation and storage
conditions. These, in turn, perpetuate the release of leachates, which may further contribute to
corrosion in the PWR. This necessitated the undertaking of this study, which was to evaluate
whether it is possible to recover the high value ⁷Li⁺ isotope from a degraded nuclear grade
resin in such a way that the isotope may be used in the PWR.
Subjects/Keywords: Lithium – Isotopes;
Ion exchange resins – Effect of temperature on
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APA (6th Edition):
Basitere, M. (2011). Desorption of lithium 7 isotope from a degraded amberlite lithiated mixed-bed-resin
. (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/2166
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):
Basitere, Moses. “Desorption of lithium 7 isotope from a degraded amberlite lithiated mixed-bed-resin
.” 2011. Thesis, Cape Peninsula University of Technology. Accessed April 14, 2021.
http://etd.cput.ac.za/handle/20.500.11838/2166.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Basitere, Moses. “Desorption of lithium 7 isotope from a degraded amberlite lithiated mixed-bed-resin
.” 2011. Web. 14 Apr 2021.
Vancouver:
Basitere M. Desorption of lithium 7 isotope from a degraded amberlite lithiated mixed-bed-resin
. [Internet] [Thesis]. Cape Peninsula University of Technology; 2011. [cited 2021 Apr 14].
Available from: http://etd.cput.ac.za/handle/20.500.11838/2166.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Basitere M. Desorption of lithium 7 isotope from a degraded amberlite lithiated mixed-bed-resin
. [Thesis]. Cape Peninsula University of Technology; 2011. Available from: http://etd.cput.ac.za/handle/20.500.11838/2166
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Ryerson University
19.
Cameron, Ellen.
The effects of water temperature on fatty acid content in the diatom, navicula pelliculosa.
Degree: 2017, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A6507
► Algae are critical to aquatic ecosystems and provide nutritious food to primary consumers due to their ability to synthesize essential fatty acids, in particular, long-chain…
(more)
▼ Algae are critical to aquatic ecosystems and provide nutritious food to primary consumers due to their ability to synthesize essential fatty acids, in particular, long-chain polyunsaturated fatty acids (LC-PUFA). Aquatic ecosystems are experiencing increases in surface water temperatures as a result of anthropogenic climate change. Elevated water temperatures can potentially cause thermal stress for algae and disrupt critical physiological and biochemical mechanisms. As a response to temperature changes, fatty acid composition in membranes shifts in order to maintain membrane fluidity. To gain a better understanding of how elevated temperature influences fatty acid composition, growth experiments of a cosmopolitan freshwater diatom species, Navicula pelliculosa, were performed in a temperature-controlled laboratory environment. Diatom cultures were grown under different thermal regimes to examine the effects of temperature and time on LC-PUFA content. Temperature treatments were found to elicit an asymmetrical response in FA content, potentially resulting in reduced LC-PUFA availability.
Subjects/Keywords: Aquatic ecology – Effect of temperature on.; Fatty acids – Analysis.; Diatoms – Research.
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APA (6th Edition):
Cameron, E. (2017). The effects of water temperature on fatty acid content in the diatom, navicula pelliculosa. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A6507
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):
Cameron, Ellen. “The effects of water temperature on fatty acid content in the diatom, navicula pelliculosa.” 2017. Thesis, Ryerson University. Accessed April 14, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A6507.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cameron, Ellen. “The effects of water temperature on fatty acid content in the diatom, navicula pelliculosa.” 2017. Web. 14 Apr 2021.
Vancouver:
Cameron E. The effects of water temperature on fatty acid content in the diatom, navicula pelliculosa. [Internet] [Thesis]. Ryerson University; 2017. [cited 2021 Apr 14].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A6507.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cameron E. The effects of water temperature on fatty acid content in the diatom, navicula pelliculosa. [Thesis]. Ryerson University; 2017. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A6507
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Alberta
20.
Slomp, Florence J.
The effect of ambient temperature on anaerobic
threshold.
Degree: MS, Department of Physical Education and Sport
Studies, 1985, University of Alberta
URL: https://era.library.ualberta.ca/files/dn39x357p
Subjects/Keywords: Exercise – Effect of temperature on.
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APA (6th Edition):
Slomp, F. J. (1985). The effect of ambient temperature on anaerobic
threshold. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/dn39x357p
Chicago Manual of Style (16th Edition):
Slomp, Florence J. “The effect of ambient temperature on anaerobic
threshold.” 1985. Masters Thesis, University of Alberta. Accessed April 14, 2021.
https://era.library.ualberta.ca/files/dn39x357p.
MLA Handbook (7th Edition):
Slomp, Florence J. “The effect of ambient temperature on anaerobic
threshold.” 1985. Web. 14 Apr 2021.
Vancouver:
Slomp FJ. The effect of ambient temperature on anaerobic
threshold. [Internet] [Masters thesis]. University of Alberta; 1985. [cited 2021 Apr 14].
Available from: https://era.library.ualberta.ca/files/dn39x357p.
Council of Science Editors:
Slomp FJ. The effect of ambient temperature on anaerobic
threshold. [Masters Thesis]. University of Alberta; 1985. Available from: https://era.library.ualberta.ca/files/dn39x357p
Oregon State University
21.
Bury, Gwendolynn Wolfheim.
An Integrated Approach to Gauge the Effects of Global Climate Change on Headwater Stream Ecosystems.
Degree: PhD, Zoology, 2015, Oregon State University
URL: http://hdl.handle.net/1957/57434
► Climate change is predicted to affect ecosystems, including systems already stressed by human impacts. One ecosystem that is already highly impacted by human land use…
(more)
▼ Climate change is predicted to affect ecosystems, including systems already stressed by human impacts. One ecosystem that is already highly impacted by human land use is the cold headwater stream system of the Pacific Northwest. One method of assessing the function of an ecosystem is by using an indicator species. Rhyacotriton variegatus is one such indicator species, sensitive to disturbance, and especially to
temperature elevation. This study combines field measurements from the warmest edge of the range of R. variegatus, laboratory determination of thermal tolerance, and modeling. These diverse experimental sources combine to clarify the potential risks of climate change on R. variegatus, and the headwater streams they occupy.
Abiotic factors are important determinates of the range of species. Predicted range shifts under climate change are based on the assumption that
temperature increases will make habitat at the edge of the known range unsuitable in the future. In order to accurately predict such changes, a quantification of the current thermal boundary is needed. In Chapter Two, I placed
temperature loggers and measured other environmental variables in 28 streams: 8 in the cool core of the range of R. variegatus, 10 as far east and south as R. variegatus has ever been found, and 10 outside the known range of R. variegatus. The variables which best defined the range edge were degree days (number of days over specific temperatures), and the slope of the stream bed.
Specific physiological tolerance information is also essential for accurate modeling of species habitats. Physiological limits should be determined experimentally using procedures that mimic natural conditions as closely as possible, so that the results will be applicable to natural systems. Forecasting the effects of human activities on populations also requires an understanding of how specific abiotic changes will impact different life stages. I used a realistic cycling
temperature treatment in Capters Three and Four, based on the data collected in Chapter One. I tested the survival of larval R. variegatus at a chronic exposure (21 days), and the level of stress as measured by corticosterone in adult R. variegatus. Larval R. variegatus survived up to a daily maximum of 23° C, beyond this the larvae died (LT 50 value of 24° C). I found that daily maximum temperatures over 18° C caused a doubling of corticosterone.
There are many ways of modeling future climate change and the
effect of this change on species' distribution. I chose to use large array of potential climate futures, modeling methods, and time periods to forecast the change in R. variegatus' range. This allowed me to compare the variation between the predictions for climate change, and find averages across the models. I used two correlative models, and one mechanistic model. The mechanistic model incorporated the relationship between air and water
temperature from Chapter Two, and the physiological limits from Chapters Three and Four. All models predicted decreases in areas of…
Advisors/Committee Members: Arnold, Stevan (advisor), Houck, Lynne (committee member).
Subjects/Keywords: Climate change; Rhyacotriton – Effect of temperature on – Northwest, Pacific
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APA (6th Edition):
Bury, G. W. (2015). An Integrated Approach to Gauge the Effects of Global Climate Change on Headwater Stream Ecosystems. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/57434
Chicago Manual of Style (16th Edition):
Bury, Gwendolynn Wolfheim. “An Integrated Approach to Gauge the Effects of Global Climate Change on Headwater Stream Ecosystems.” 2015. Doctoral Dissertation, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/57434.
MLA Handbook (7th Edition):
Bury, Gwendolynn Wolfheim. “An Integrated Approach to Gauge the Effects of Global Climate Change on Headwater Stream Ecosystems.” 2015. Web. 14 Apr 2021.
Vancouver:
Bury GW. An Integrated Approach to Gauge the Effects of Global Climate Change on Headwater Stream Ecosystems. [Internet] [Doctoral dissertation]. Oregon State University; 2015. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/57434.
Council of Science Editors:
Bury GW. An Integrated Approach to Gauge the Effects of Global Climate Change on Headwater Stream Ecosystems. [Doctoral Dissertation]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/57434
Oregon State University
22.
Yao, Cheng C.
Environmental influences on monoterpenes and phenolics of Mentha piperita.
Degree: MS, Biochemistry and Biophysics, 1984, Oregon State University
URL: http://hdl.handle.net/1957/40946
► Vegetatively propagated peppermint (Mentha piperita L., cv. Black Mitcham) was used to determine the effects of night temperatures (8°C vs 25°C) on the plant growth…
(more)
▼ Vegetatively propagated peppermint (Mentha piperita L., cv. Black Mitcham) was used to determine the effects of night temperatures (8°C vs 25°C) on the plant growth in terms of fresh weight and leaf area, and on metabolite contents. The plants were sampled after 14 days, 21 days and 28 days in the controlled environments. Warm-night plants grew faster than cool-night plants, seen in larger leaf area and greater fresh weight on whole plant or leaf basis. Cool night (8 ° C) favored anthocyanin synthesis and accumulation. Warm night (25 C) resulted in very low levels of anthocyanin pigment. Monoterpene content and composition were also influenced by the night temperatures. Warm-night plants produced more essential oil than cool-night plants at all three sampling dates, approximately in proportion to the additional growth. However, the cool-night plants had higher percentages of reduced forms of monoterpenes such as menthone and menthol, and lower percentages of the oxidized monoterpenes pulegone and menthofuran. Although warm-night plants showed higher total measured amounts of starch and sugars, the specific contents per unit area tended to be lower than in cool-night plants. Leaf expansion growth apparently utilized substrates that otherwise might have been used in secondary product synthesis or retained as reserves.
Advisors/Committee Members: Loomis, W. David (advisor), Baisted, Derek J. (committee member).
Subjects/Keywords: Plants; Effect of temperature on
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APA (6th Edition):
Yao, C. C. (1984). Environmental influences on monoterpenes and phenolics of Mentha piperita. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/40946
Chicago Manual of Style (16th Edition):
Yao, Cheng C. “Environmental influences on monoterpenes and phenolics of Mentha piperita.” 1984. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/40946.
MLA Handbook (7th Edition):
Yao, Cheng C. “Environmental influences on monoterpenes and phenolics of Mentha piperita.” 1984. Web. 14 Apr 2021.
Vancouver:
Yao CC. Environmental influences on monoterpenes and phenolics of Mentha piperita. [Internet] [Masters thesis]. Oregon State University; 1984. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/40946.
Council of Science Editors:
Yao CC. Environmental influences on monoterpenes and phenolics of Mentha piperita. [Masters Thesis]. Oregon State University; 1984. Available from: http://hdl.handle.net/1957/40946
Oregon State University
23.
Rieke, Ross D.
The role of specific surface area and related index properties in the frost susceptibility of soils.
Degree: MS, Civil Engineering, 1982, Oregon State University
URL: http://hdl.handle.net/1957/41810
Subjects/Keywords: Soils – Effect of temperature on
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APA (6th Edition):
Rieke, R. D. (1982). The role of specific surface area and related index properties in the frost susceptibility of soils. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/41810
Chicago Manual of Style (16th Edition):
Rieke, Ross D. “The role of specific surface area and related index properties in the frost susceptibility of soils.” 1982. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/41810.
MLA Handbook (7th Edition):
Rieke, Ross D. “The role of specific surface area and related index properties in the frost susceptibility of soils.” 1982. Web. 14 Apr 2021.
Vancouver:
Rieke RD. The role of specific surface area and related index properties in the frost susceptibility of soils. [Internet] [Masters thesis]. Oregon State University; 1982. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/41810.
Council of Science Editors:
Rieke RD. The role of specific surface area and related index properties in the frost susceptibility of soils. [Masters Thesis]. Oregon State University; 1982. Available from: http://hdl.handle.net/1957/41810
Oregon State University
24.
Hutchison, Roy Emery.
Studies of factors affecting injury to crops by low temperatures during the growing season.
Degree: MS, Farm Crops, 1936, Oregon State University
URL: http://hdl.handle.net/1957/52342
Subjects/Keywords: Plants; Effect of temperature on
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APA (6th Edition):
Hutchison, R. E. (1936). Studies of factors affecting injury to crops by low temperatures during the growing season. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/52342
Chicago Manual of Style (16th Edition):
Hutchison, Roy Emery. “Studies of factors affecting injury to crops by low temperatures during the growing season.” 1936. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/52342.
MLA Handbook (7th Edition):
Hutchison, Roy Emery. “Studies of factors affecting injury to crops by low temperatures during the growing season.” 1936. Web. 14 Apr 2021.
Vancouver:
Hutchison RE. Studies of factors affecting injury to crops by low temperatures during the growing season. [Internet] [Masters thesis]. Oregon State University; 1936. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/52342.
Council of Science Editors:
Hutchison RE. Studies of factors affecting injury to crops by low temperatures during the growing season. [Masters Thesis]. Oregon State University; 1936. Available from: http://hdl.handle.net/1957/52342
Oregon State University
25.
Ghariani, Karim.
Chilling requirement affects plant response to hydrogen cyanamide in apple cultivars.
Degree: MS, Horticulture, 1993, Oregon State University
URL: http://hdl.handle.net/1957/25751
► Chilling requirements of 43 apple and 38 pear cultivars were estimated over a 2 year period by cutting shoots in the field at weekly intervals…
(more)
▼ Chilling requirements of 43 apple and 38 pear cultivars
were estimated over a 2 year period by cutting shoots in the
field at weekly intervals and forcing them in a warm
greenhouse for 4 weeks. For apples, the mean values ranged
from 490 Chill Units (CU) +- 1 for 'Dorsett Golden' to
1320.5 CU +- 8 for 'Cortland', 'Marshall Mclntosh' and
'Starking Delicious'. For pears, the mean values ranged from
749 CU +- 9 for 'Batjarka' to 1320.5 CU +- 8 for 'Poirier
Fleurissant Tard'. Interval of sampling, coastal
effect and
involvment of other factors than CU accumulation in
releasing plants from dormancy could be among the possible
explanations for the variations in the year-to-year
estimation of the chilling requirement.
Budbreak and phytotoxicity (expressed as percent dead
buds) induced by hydrogen cyanamide in apple cultivars
depend on hydrogen cyanamide concentration, time of
application and chilling requirements of the cultivars.
'Arlet' (811.5 CU), having the lowest chilling requirement,
showed a different endodormancy pattern than 'Braeburn'
(1141 CU), 'Golden Delicious' (1277 CU) and 'Starking
Delicious' (1320.5 CU), resulting in a different response to
the chemical. During early to deep dormancy, 'Braeburn',
'Golden Delicious' and 'Starking Delicious' exhibited a
greater tolerance to hydrogen cyanamide, with an increase in
budbreak and a reduction in phytotoxicity. In 'Arlet'
however, the level of tolerance did not increase
significantly during this period. Towards the end of
endodormancy, the sensitivity to the chemical increased in
all cultivars, but at a higher rate in 'Braeburn', 'Golden
Delicious' and 'Starking Delicious' than in 'Arlet'. The
sensitivity to hydrogen cyanamide was also dependent on bud
and internode position in the shoot, with an increasing
tolerance from the top to the base. This gradient
disappeared after satisfaction of the chilling requirement
of the buds, while it remained for the internodes,
suggesting that other factors, unrelated to the dormant
period, may be involved in determining the differential
sensitivity of the stem along the shoot.
Advisors/Committee Members: Stebbins, Robert L. (advisor), Seddigh, Majid (committee member).
Subjects/Keywords: Apples – Effect of temperature on
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APA (6th Edition):
Ghariani, K. (1993). Chilling requirement affects plant response to hydrogen cyanamide in apple cultivars. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/25751
Chicago Manual of Style (16th Edition):
Ghariani, Karim. “Chilling requirement affects plant response to hydrogen cyanamide in apple cultivars.” 1993. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/25751.
MLA Handbook (7th Edition):
Ghariani, Karim. “Chilling requirement affects plant response to hydrogen cyanamide in apple cultivars.” 1993. Web. 14 Apr 2021.
Vancouver:
Ghariani K. Chilling requirement affects plant response to hydrogen cyanamide in apple cultivars. [Internet] [Masters thesis]. Oregon State University; 1993. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/25751.
Council of Science Editors:
Ghariani K. Chilling requirement affects plant response to hydrogen cyanamide in apple cultivars. [Masters Thesis]. Oregon State University; 1993. Available from: http://hdl.handle.net/1957/25751
Oregon State University
26.
Garreton, Marta S.
Bioenergetics of yolk utilization in embryos and yolk-sac larvae of the surf-smelt Hypomesus pretiosus pretiosus (Girard, 1855) under different incubation temperatures.
Degree: MS, Oceanography, 1983, Oregon State University
URL: http://hdl.handle.net/1957/26766
Subjects/Keywords: Smelts – Effect of temperature on
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APA (6th Edition):
Garreton, M. S. (1983). Bioenergetics of yolk utilization in embryos and yolk-sac larvae of the surf-smelt Hypomesus pretiosus pretiosus (Girard, 1855) under different incubation temperatures. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/26766
Chicago Manual of Style (16th Edition):
Garreton, Marta S. “Bioenergetics of yolk utilization in embryos and yolk-sac larvae of the surf-smelt Hypomesus pretiosus pretiosus (Girard, 1855) under different incubation temperatures.” 1983. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/26766.
MLA Handbook (7th Edition):
Garreton, Marta S. “Bioenergetics of yolk utilization in embryos and yolk-sac larvae of the surf-smelt Hypomesus pretiosus pretiosus (Girard, 1855) under different incubation temperatures.” 1983. Web. 14 Apr 2021.
Vancouver:
Garreton MS. Bioenergetics of yolk utilization in embryos and yolk-sac larvae of the surf-smelt Hypomesus pretiosus pretiosus (Girard, 1855) under different incubation temperatures. [Internet] [Masters thesis]. Oregon State University; 1983. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/26766.
Council of Science Editors:
Garreton MS. Bioenergetics of yolk utilization in embryos and yolk-sac larvae of the surf-smelt Hypomesus pretiosus pretiosus (Girard, 1855) under different incubation temperatures. [Masters Thesis]. Oregon State University; 1983. Available from: http://hdl.handle.net/1957/26766
Oregon State University
27.
Pongviratchai, Panida.
Gelation properties of Alaska pollock surimi with functional ingredients under ohmic heating.
Degree: MS, Food Science and Technology, 2002, Oregon State University
URL: http://hdl.handle.net/1957/27080
► The rheological, color, micro-structural, and electrical properties of surimi seafood gels were investigated. Various starches and protein additives at different ratios were evaluated with Alaska…
(more)
▼ The rheological, color, micro-structural, and electrical properties of surimi
seafood gels were investigated. Various starches and protein additives at different
ratios were evaluated with Alaska pollock surimi under ohmic heating at different
heating rates to determine their functional properties and further to compare these
properties with those of conventionally cooked gels.
Native starches at low concentration were able to enhance rheological
properties due to their gelatinization during heating. Pregelatinized starch
decreased texture properties; however, it could suppress the undesirable appearance
of the final product because its granules could absorb the surrounding water during
chopping and perform a higher degree of retrogradation when cooling. A mixture
of native and pregelatinized starches showed a positive trend at high concentration.
The more starch added, the lower the L* and b* values of the gels. Protein additives improved textural properties, but negatively affected gel colors. Lower
moisture content of the final products showed higher strength in texture, but lower
lightness values.
Gels cooked under ohmic heating with a slow heating rate mostly exhibited
better texture properties than conventionally cooked gels. Electrical conductivities
increased when
temperature increased, resulting in a linear relationship. Electrical
conductivity also significantly increased with moisture content, and slightly
increased with applied frequency and voltage. There were some changes in the
magnitude of electrical conductivity of surimi-starch paste when
temperature
increased, most obviously seen at a high concentration of native starch with slow
ohmic heating. This indicated that starch gelatinization affected the electrical
conductivity of surimi-starch paste while heating.
Advisors/Committee Members: Park, Jae W. (advisor).
Subjects/Keywords: Surimi – Effect of temperature on
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APA (6th Edition):
Pongviratchai, P. (2002). Gelation properties of Alaska pollock surimi with functional ingredients under ohmic heating. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/27080
Chicago Manual of Style (16th Edition):
Pongviratchai, Panida. “Gelation properties of Alaska pollock surimi with functional ingredients under ohmic heating.” 2002. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/27080.
MLA Handbook (7th Edition):
Pongviratchai, Panida. “Gelation properties of Alaska pollock surimi with functional ingredients under ohmic heating.” 2002. Web. 14 Apr 2021.
Vancouver:
Pongviratchai P. Gelation properties of Alaska pollock surimi with functional ingredients under ohmic heating. [Internet] [Masters thesis]. Oregon State University; 2002. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/27080.
Council of Science Editors:
Pongviratchai P. Gelation properties of Alaska pollock surimi with functional ingredients under ohmic heating. [Masters Thesis]. Oregon State University; 2002. Available from: http://hdl.handle.net/1957/27080
Oregon State University
28.
Pipatsattayanuwong, Siriporn.
Alternative products from Pacific whiting : fresh surimi and texturized mince.
Degree: MS, Food Science and Technology, 1995, Oregon State University
URL: http://hdl.handle.net/1957/27380
► The major portion of Pacific whiting (PW) is commercialized in the form of frozen surimi. Alternative products for PW were investigated focusing on fresh surimi…
(more)
▼ The major portion of Pacific whiting (PW) is commercialized in the form of frozen
surimi. Alternative products for PW were investigated focusing on fresh surimi and
texturized meat from PW mince. Fresh surimi is made without additives and kept
refrigerated instead of frozen. Texturized meat is a meat-like product made from PW
mince through freeze-texturization.
Fresh surimi was stored at 5°C and analyzed for its total aerobic plate count
(APC), shear stress, shear strain, and color during 7 days storage. Frozen surimi from PW
was prepared with 0, 3, 6, and 9% cryoprotectants and was compared with fresh surimi
for its gel forming ability. Fresh surimi had a shelf life of 5 days and the gel forming ability
remained unchanged throughout storage time. Shear strain of fresh surimi was not different from frozen surimi with 9% cryoprotectants but shear stress was almost 3 times
higher than the frozen one.
Texturized meat from PW mince was prepared from unwashed or 1-washed mince
kept frozen for 6-8 mo with or without the addition of 6% cryoprotectants. The minces
were comminuted into a protein slurry, formed into patties, and frozen at -7, -18, and
-50°C. The evaluations of ice formation (by microscopic study), hardness, cook loss,
color, and water holding capacity were carried out during 20 days storage. The results
showed that texturized meat with parallel layers was made from 1-washed PW mince.
Unwashed PW mince created a sponge-like texture and had rapid quality deterioration,
thus it is not recommended for this product. Cryoprotectants did not significantly affect
the texture formation of the product and are not required to store mince as raw material
for the texturized meat. The optimum freeze-texturized
temperature for this product was
-18°C or lower because it minimized quality changes during storage depending on the
desirable texture. The lower the
temperature (higher freezing rate), the finer the layers
created.
Advisors/Committee Members: Morrissey, Michael T. (advisor).
Subjects/Keywords: Surimi – Effect of temperature on
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APA (6th Edition):
Pipatsattayanuwong, S. (1995). Alternative products from Pacific whiting : fresh surimi and texturized mince. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/27380
Chicago Manual of Style (16th Edition):
Pipatsattayanuwong, Siriporn. “Alternative products from Pacific whiting : fresh surimi and texturized mince.” 1995. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/27380.
MLA Handbook (7th Edition):
Pipatsattayanuwong, Siriporn. “Alternative products from Pacific whiting : fresh surimi and texturized mince.” 1995. Web. 14 Apr 2021.
Vancouver:
Pipatsattayanuwong S. Alternative products from Pacific whiting : fresh surimi and texturized mince. [Internet] [Masters thesis]. Oregon State University; 1995. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/27380.
Council of Science Editors:
Pipatsattayanuwong S. Alternative products from Pacific whiting : fresh surimi and texturized mince. [Masters Thesis]. Oregon State University; 1995. Available from: http://hdl.handle.net/1957/27380
Oregon State University
29.
Maslen, Erika A.
The Impact of Temperature on Halyomorpha halys (Hemiptera: Pentatomidae) Life Table Parameters and Feeding Pressure.
Degree: MS, Horticulture, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59851
► Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) is an invasive insect pest that has become established and problematic in the Pacific Northwest. Known colloquially as the brown…
(more)
▼ Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) is an invasive insect pest that has become established and problematic in the Pacific Northwest. Known colloquially as the brown marmorated stink bug (BMSB), H. halys causes direct damage through feeding activity on a wide range of agronomic and horticultural crops. The objectives of this research were: 1) to establish ovipositional and survival thresholds of H. halys; and 2) to determine the impact of life stage and
temperature on feeding activity using wine grapes as a model host plant. In the first study, cohorts of H. halys were exposed to seven constant temperatures, from 15 to 32°C, in growth chambers to determine longevity and fecundity. The lower and upper
temperature thresholds for reproduction was 18 and 32°C, respectively. As temperatures increased, survival of adult females decreased. Highest rates of oviposition occurred at 25°C, followed in order by 27, 22, 32 and 18°C. Pre-ovipositional periods were shortest at 30°C at 7 days, while ovipositional periods were longest at 22°C at 113 days, with highest mean oviposition at 25°C at 1.43 ± 0.21 eggs per female per day. Mean female longevity was highest at 18°C at 76.1 days. In the second study, the impact of life stage and
temperature on H. halys feeding was determined on wine grapes for four weeks during pre-véraison to determine the relative feeding activity. Both
temperature and life stage had a significant
effect on feeding activity in wine grapes. The mean number of stylet sheaths, an indicator of feeding activity, was highest at 1.226 ± 0.282 stylet sheaths per berry in sunny regimes containing adults and lowest at 0.028 ± 0.012 stylet sheaths per berry in shady regimes containing eggs. Average cluster and berry weight, diameter and number of berries per cluster were not significantly different between
temperature regimes. The results from these studies demonstrates the relative importance of the environment as indicated by accumulated degree-days and life stage on feeding activity. Feeding activity was higher in older life stages and increased with the accumulation of degree days. The data can be incorporated into control and management strategies, as well as in prediction and risk models.
Advisors/Committee Members: Walton, Vaughn M. (advisor), Wiman, Nik (committee member).
Subjects/Keywords: BMSB; Brown marmorated stink bug – Effect of temperature on – Northwest, Pacific
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APA (6th Edition):
Maslen, E. A. (2016). The Impact of Temperature on Halyomorpha halys (Hemiptera: Pentatomidae) Life Table Parameters and Feeding Pressure. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59851
Chicago Manual of Style (16th Edition):
Maslen, Erika A. “The Impact of Temperature on Halyomorpha halys (Hemiptera: Pentatomidae) Life Table Parameters and Feeding Pressure.” 2016. Masters Thesis, Oregon State University. Accessed April 14, 2021.
http://hdl.handle.net/1957/59851.
MLA Handbook (7th Edition):
Maslen, Erika A. “The Impact of Temperature on Halyomorpha halys (Hemiptera: Pentatomidae) Life Table Parameters and Feeding Pressure.” 2016. Web. 14 Apr 2021.
Vancouver:
Maslen EA. The Impact of Temperature on Halyomorpha halys (Hemiptera: Pentatomidae) Life Table Parameters and Feeding Pressure. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/1957/59851.
Council of Science Editors:
Maslen EA. The Impact of Temperature on Halyomorpha halys (Hemiptera: Pentatomidae) Life Table Parameters and Feeding Pressure. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59851
University of Johannesburg
30.
Rex, Derek Ashley.
Temperatuur-geinduseerde oksidatiewe beskadiging in menslike rooibloedselle : 'n in vitro studie.
Degree: 2014, University of Johannesburg
URL: http://hdl.handle.net/10210/10095
M.Sc.
Please refer to full text to view abstract
Subjects/Keywords: Erythrocytes - Effect of temperature on
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APA (6th Edition):
Rex, D. A. (2014). Temperatuur-geinduseerde oksidatiewe beskadiging in menslike rooibloedselle : 'n in vitro studie. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/10095
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):
Rex, Derek Ashley. “Temperatuur-geinduseerde oksidatiewe beskadiging in menslike rooibloedselle : 'n in vitro studie.” 2014. Thesis, University of Johannesburg. Accessed April 14, 2021.
http://hdl.handle.net/10210/10095.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rex, Derek Ashley. “Temperatuur-geinduseerde oksidatiewe beskadiging in menslike rooibloedselle : 'n in vitro studie.” 2014. Web. 14 Apr 2021.
Vancouver:
Rex DA. Temperatuur-geinduseerde oksidatiewe beskadiging in menslike rooibloedselle : 'n in vitro studie. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Apr 14].
Available from: http://hdl.handle.net/10210/10095.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rex DA. Temperatuur-geinduseerde oksidatiewe beskadiging in menslike rooibloedselle : 'n in vitro studie. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/10095
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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Open Access Theses and Dissertations
