Antimicrobial, antioxidant properties and chemical composition of Seaweeds collected from Saudi Arabia (Red Sea and Arabian Gulf)

Publication date: Available online 16 June 2016 Source:Saudi Journal of Biological Sciences Author(s): Nadine M.S. Moubayed, Hadeel Jawad Al Houri, Manal M. Al Kholaifi, Dunia A. Al Farraj The present study demonstrates the antibacterial activity of selected brown and green marine algae collected from Saudi Arabia Red Sea and Arabian Gulf. The methanolic and acetone extracts were tested against gram positive, gram negative bacteria and Candida albicans in an attempt to be used as an alternative to commonly used antibiotics. Both brown seaweed species Sargassum latifolium B and Sargassum platycarpumA methanolic extracts were found to be active against gram positive than gram negative; however, Sargassum latifolium acetone extract gave the highest inhibitory activity against Salmonella sp. On the other hand, Cladophorasocialis organic extract demonstrated higher antibacterial activity than the fresh extract but both Cladophora socialis extracts revealed decreased activity compared to Sargassum extracts. Cladophora methanolic extract showed an obvious effect on methicillin resistant Staphylococcus aureus (MRSA). The present work shows a comparable therapeutic potency of the tested seaweed members Sargassum and Cladophora extracts in treating human microbial pathogens to synthetic chemical antibiotics. A remarkable higher antioxidant DPPH free radical scavenging effect was recorded with Sargassum sp. compared to Cladophora sp. FTIR infrared Spectrometer analysis toge...
Source: Saudi Journal of Biological Sciences - Category: Biology Source Type: research