잘피(Zostera marina) 에탄올 및 물 추출물의 항산화 효과

Abstract

본 연구는 잘피 추출물로부터의 항산화 효과를 알아보았다. 총 폴리페놀 함량에서는 에탄올 추출물과 물 추출물이 각각 2.12 mg/g, 3.88 mg/g으로 측정되었다. DPPH 라디칼 소거능의 경우 에탄올 추출물이 1 mg/ml농도에서 94%로 물 추출물보다 더 높았으며 환원력은 두 추출물 모두 농도의존적인 경향을 나타냈다. 금속봉쇄력의 경우 물 추출물이 에탄올 추출물 보다 더 높았고 rancimat에 의한 산화도 측정 시 에탄올 추출물이 1 mg/ml농도에서 66%로 물 추출물보다 더 높았음을 알 수 있었다. 이러한 결과는 잘피 추출물이 식품산업에서 천연항산화제로서 사용이 될 수 있음을 보여준다. 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.