Effect of short-term hydrogen peroxide stress in the marine cyanobacterium Synechococcus aeruginosus

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.