Author(s):

J Mohammed Hussain, P Muruganantham, M Vinoth, G Jeevanantham and Dr. A Khaleel Ahamed

Abstract: Effect of 1mM H₂O₂ stress in the marine cyanobacterium Synechococcus aeruginosus showed a marked increase in chlorophyll, ascorbic acid, glutathione and polyphenolics contents at 15 min while phycobiliproteins at 30 min. Astaxanthin content increased during all time periods of H₂O₂ stress. Gels stained for antioxidant enzyme activities in native PAGE showed the preservation of superoxide dismutase, glutathione peroxidase, glutathione S- transferse and esterase activities against H₂O₂ stress.

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