Journal
JOURNAL OF PLANT PHYSIOLOGY
Volume 161, Issue 5, Pages 591-597Publisher
ELSEVIER GMBH
DOI: 10.1078/0176-1617-01230
Keywords
ascorbate peroxidase; catalase; Chlorella vulgaris; glutathione reductase; lipid peroxidation; proline; superoxide dismutase
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A concentration dependent increase in lipid peroxidation, carotenoid content and activity of superoxide dismutase was observed in the green microalga Chlorella vulgaris following copper exposure. In contrast, activities of catalase, ascorbate peroxidase and glutathione reductase, and the cellular GSH, ascorbate and K+ pool depicted a reverse trend. However, a significant rise in intracellular proline content was also evident in copper supplemented cultures. Though this study depicted the malfunction of the major antioxidant system of C. vulgaris under copper stress the test organism was found to survive and grow even at 3.0 mug mL(-1) of Cu treatment (32 % growth). Further study is needed to establish the role of proline in metal toxicity regulation.
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