Antibacterial and antioxidant activities of hydro-alcoholic extracts of some marine algal species from Persian Gulf coastal waters in Booshehr province

Antioxidant and antibacterial potential of hydro-alcoholic extracts of 3 marine green, brown and red algae species were investigated.According to the Trolex antioxidant potential test, Entreromorpha intestinalis (green algae) and Gracilaria corticata (red algae) showed the highest and the lowest amounts of total phenol and the best antioxidant activity, respectively. In this test, the most inhibitory percent were calculated in green algae and the lowest percent were from Cystoseiramyrica (brown algae). According to the Azinobis ethyl thiazolinesolphonic test (ABTS, 50mg/ml), green algae and brown algae showed the highest and the lowest amounts of total phenol and the best antioxidant activity, respectively. Hydro-alcoholic extracts from these different species had no antibacterial effect on two species of bacteria, which were tested in this study.