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Edreva, A., Velikova, V., Tsonev, T., Dagnon, S., Gürel, A., AktaS, L. and Gesheva, E. (2008) Stress-Protective Role of Secondary Metabolites: Diversity of Functions and Mechanisms. General and Applied Plant Physiology, XXXIV, 67-78.

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• TITLE: Induced Accumulation of Polyphenolics and Flavonoids in Cyanobacteria under Salt Stress Protects Organisms through Enhanced Antioxidant Activity

  AUTHORS: Dhananjaya P. Singh, Ratna Prabha, Kamlesh K. Meena, Lalan Sharma, Arun K. Sharma

  KEYWORDS: Cyanobacteria; Phenylpropanoids; Flavonoids; Antioxidants; Stress Tolerance

  JOURNAL NAME: American Journal of Plant Sciences, Vol.5 No.5, March 19, 2014

  ABSTRACT: Induced accumulation of polyphenolics and flavonoids in cyanobacterial strains grown under different salt concentrations is correlated with their growth under stress conditions and enhanced antioxidant activity. Plectonema boryanum, Hapalosiphon intricatus, Anabaena doliolum and Oscillatoria acuta grown for 21 days under different salt concentrations (80, 160, 240, 320 and 400 mM) in BG11 medium showed differential growth responses in terms of biomass, total protein, chlorophyll content, total content of polyphenol, flavonoid and carotenoid, accumulation of phenolic acids (gallic, caffeic, chlorogenic, ferullic and vanillic) and flavonoids (rutin and quercetin). Cyanobacterial extracts showed prominent free radical scavenging antioxidant activity (AOA) in terms of % DPPH discoloration. Highly significant (p