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KMID : 0613820170270030346
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Journal of Life Science
2017 Volume.27 No. 3 p.346 ~ p.350
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Antioxidant Effect of Zostera marina Ethanol and Water Extracts
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Park Sun-Hee
Kim Koth-Bong-Woo-Ri
Kim Min-Ji
Im Moo-Hyeog
Ahn Dong-Hyun
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Abstract
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Seaweeds have a number of secondary metabolites, such as polyphenols, polysaccharides, and carotenoids, and have received much attention as a source of natural antioxidants. Thus, this study was carried out to examine the antioxidant activities from ethanol (EE) and water (WE) extracts of Zostera marina. Their antioxidant effects were investigated using total polyphenol contents (TPC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, reducing power, and chelating effect. TPC of EE and WE was 2.12 mg/g and 3.88 mg/g, respectively. DPPH radical scavenging activities of EE and WE were increased in a dose-dependent manner. In particular, EE had DPPH radical scavenging activity of 93% at a concentration of 0.5 mg/ml, and was higher than that of WE (71%). EE and WE increased reducing power in a concentration-dependent manner, but their effects were lower than that of the control (ascorbic acid). In case of chelating effect, WE was 66% at a concentration of 1 mg/ml, and was stronger than EE (6%). These results suggest that extracts of Zostera marina can be potentially used as proper natural antioxidants in the food industry.
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KEYWORD
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Antioxidant activity, DPPH radical scavenging activity, natural antioxidant, Zostera marina
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