AN ASSESSMENT OF ANTI-OXIDANT ACTIVITY OF MARINE ALGAL POLYPHENOLS RETRIEVED FROM SARGASSUM WIGHTII, TURBINARIA ORNATA, GRACILARIA CORTICATA AND GELIDIELLA ACEROSA

Objective: To assess the anti-oxidant activity of different seaweed extract. Methods: Different seaweeds as Sargassum wightii, Turbinaria ornata, Gracilaria corticata and Gelidiella acerosa were collected from Mandapam, Ramanathapuram District, Tamil Nadu, India and assessed for their suitability as anti-oxidant compounds. Seaweeds were cleaned from epiphytes, washed, dried in shade and powdered. Algae extractions were performed using different solvents such as methanol, ethanol and hexane. Anti-oxidant potential of marine algal polyphenol from methanol, Ethanol and Hexane extract(s) of seaweed were determined using different method as DPPH radical scavenging assay, Ferric reducing anti-oxidant property (FRAP), Ferrous Ion Chelating Activity (FICA), Reducing power, Total Anti-oxidant Capacity (TAC). The total phenolic content from different seaweeds considered for its anti-oxidant activity. Results: The DPPH radical scavenging activity in methanol extract of brown seaweed Turbinaria ornata (83.8%) is most noteworthy. In Gracilaria corticata it was 79.07 % in ethanol extract. In Sargassum wightii brown seaweed, high activity in methanol and ethanol extracts (75.51% and 70.16%) respectively were observed. The DPPH activity in ethanol extract of Sargassum wightii, Turbinaria ornata and Gelidiella acerosa was low to moderate. The most elevated reducing power activity was observed in methanol extract of Sargassum wightii than in ethanol extract. The total anti-oxidant activity is highest in methanol extract of Turbinaria ornate (105.78 mg/g). In present study methanol extraction of seaweed was found to advance the anti-oxidant activity.