Glutathione peroxidase activity in the selenium-treated alga Scenedesmus quadricauda

0367412 - MBÚ 2012 RIV NL eng J - Journal Article
Vítová, Milada - Bišová, Kateřina - Hlavová, Monika - Zachleder, Vilém - Rucki, M. - Čížková, Mária
Glutathione peroxidase activity in the selenium-treated alga Scenedesmus quadricauda.
Aquatic Toxicology. Roč. 102, 1-2 (2011), s. 87-94. ISSN 0166-445X. E-ISSN 1879-1514
R&D Projects: GA ČR GA525/09/0102
Institutional research plan: CEZ:AV0Z50200510
Keywords : Cell cycle * Enzyme activity * Glutathione peroxidase
Subject RIV: EE - Microbiology, Virology
Impact factor: 3.761, year: 2011

The green alga Scenedesmus quadricauda was used to investigate the relationship between the toxicity of selenium and the glutathione peroxidase activity. Selenium resistant strains SeIV and SeVI were synchronized and grown in high concentrations of Se (selenite or selenate). As a measure of selenium toxicity the EC50 values were determined. During growth of the untreated wild type, glutathione peroxidase activity increased slightly and then declined gradually until the end of the cell cycle. A similar pattern was observed in untreated resistant strains and when resistant strains were grown in the presence of selenium in the oxidation state to which they were resistant. In the wild type cultivated with 50 mg Se L−1 (selenite or selenate), activity increased to a high level and slowly declined until the end of the cell cycle
Permanent Link: http://hdl.handle.net/11104/0202112