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Title El sulfato como nutriente esencial en la protección contra los efectos citotóxicos del cadmio en la microalga dulceacuícula "Chlamydomonas moewussii" Gerloff
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Date Accessioned
University/Publisher Universidade da Coruña
Abstract [Abstract] Sulphate is the main source of sulphur for microalgae and, therefore, an essential nutrient for these organisms. The knowledge of the optimal concentration of nutrients is an important issue that helps to develop efficient growth systerns; in fact, the study of the kinetics of growth of microalgae is an indispensable tool in all fields of phycology. In tbe present study, using as a model the microalga Chlamydomonas moewusii, the effects of this nutrient were studied and a kinetic model was obtained to relate the growth of this microalga with sulphate. Although this nutrient has many biological functions, it was also dernostrated in this work that it has important implications in processes of tolerance to cadmium toxicity due to the existence of an interaction between both compounds. The reason for this is that sulphur compounds, rich in thiols (cysteine, y-Glu-Cys, glutathione and phytochelatins), are a mechanism of tolerance against the toxicity of this metal. It was demonstrated that higher levels of sulphate allowed a higher biosynthesis of thiols and, therefore, a higher toleran ce to this toxicity. However, an excess of this nutrient had an opposite effect causing toxicity and a higher toxic effect of cadmium.
Subjects/Keywords Chlamydomonas moewusii; Microalgas-Crecimiento; Cadmio-Toxicología
Contributors Abalde, Julio; Torres, Enrique; Universidade da Coruña. Departamento de Bioloxía Celular e Molecular
Language es
Rights Os titulares dos dereitos de propiedade intelectual autorizan a visualización do contido desta tese a través de Internet, así como a súa reproducción, gravación en soporte informático ou impresión para o seu uso privado e/ou con fins de estudo e de investigación. En nengún caso se permite o uso lucrativo deste documento. Estos dereitos afectan tanto ó resumo da tese como o seu contido Los titulares de los derechos de propiedad intelectual autorizan la visualización del contenido de esta tesis a través de Internet, así como su repoducción, grabación en soporte informático o impresión para su uso privado o con fines de investigación. En ningún caso se permite el uso lucrativo de este documento. Estos derechos afectan tanto al resumen de la tesis como a su contenido
info:eu-repo/semantics/openAccess
Country of Publication es
Record ID handle:2183/16919
Repository barcelona
Date Indexed 2018-05-04
Issued Date 2016-10-10 13:52:57

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