Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 72, Issue 4, Pages 1200-1206Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2009.01.003
Keywords
Scenedesmus vacuolatus; Chlorella kessleri; Copper content; Oxidative stress; Total reflection X-ray fluorescence (TXRF); Metabolic damage; Lipid peroxidation; Reduced glutathione; Superoxide dismutase; Catalase
Categories
Funding
- CONICET (Consejo Nacional de Investigaciones Cientificas y Tecnicas)
- Universidad de Buenos Aires
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The aim of this work was to assess the effects of 1 week copper exposure (6.2,108, 210 and 414 mu M) on Scenedesmus vacuolatus and Chlorella kessleri. The strains showed different susceptibility to copper. Copper content was determined in both strains by total X-ray reflection fluorescence analysis (TXRF). In S. vacuolatus, the increase of medium copper concentration induced an augmentation of protein and MDA content, and a significant decrease in the chlorophyll a/chlorophyll b ratio. S. vacuolatus showed a significant increase of catalase activity in 210 and 414 mu M of copper, and a significant increment of SOD activity and GSH content only in 414 mu M of copper. On the contrary, C. kessleri did not show significant differences in these parameters between 6.2 and 108 mu M of copper. Increased copper in the environment evokes oxidative stress and an increase in the antioxidant defenses of S. vacuolatus. (c) 2009 Elsevier Inc. All rights reserved.
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