Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Antioxidative Activity of Ethanol Extracts from Different Parts of Taraxacum officinale

민들레의 부위별 에탄올 추출물의 항산화 활성

  • Han, Eun-Kyung (Dept. of Food and Nutrition & Korea Nutrition Institute, Hallym University) ;
  • Jung, Eui-Jin (Dept. of Food and Nutrition & Korea Nutrition Institute, Hallym University) ;
  • Lee, Ji-Young (Dept. of Food and Nutrition & Korea Nutrition Institute, Hallym University) ;
  • Jin, Yong-Xie (Division of Functional Food & Nutrition, National Academy of Agricultural Sciences, Rural Development Administration) ;
  • Chung, Cha-Kwon (Dept. of Food and Nutrition & Korea Nutrition Institute, Hallym University)
  • 한은경 (한림대학교 식품영양학과) ;
  • 정의진 (한림대학교 식품영양학과) ;
  • 이지영 (한림대학교 식품영양학과) ;
  • 김영섭 (농촌진흥청 국립농업과학원 기능성식품과) ;
  • 정차권 (한림대학교 식품영양학과)
  • Received : 2010.11.01
  • Accepted : 2010.12.23
  • Published : 2011.01.31
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Abstract

This study was conducted to investigate antioxidative and physiological activities of ethanol extracts from different parts (flower, leaf, root, and the whole plant) of Taraxacum officinale. The ethanol extracts from different parts were measured to examine total flavonoids content, total polyphenol content, elect ron donating ability,superoxide dismutase (SOD)-like activity, nitrite-scavenging ability and tyrosinase inhibition effects. Total flavonoids content in leaf extract (41.66 mg/g) and total polyphenol content in flower extract (71.91 mg/g) were higher than those of other parts. All assays were conducted at concentrations of 0.1, 0.3, 0.5, and 1 mg/mL ethanol extracts. The electron donating abilities of leaf, flower, the whole plant, and root extracts were 92.25%, 88.18%, 84.55% and 83.40%, respectively, at a concentration of 1 mg/mL. The activities were concentration dependent. The SOD-like activity of ethanol extracts from different parts was 8.40~11.20% at a concentration of 1 mg/mL. The nitrite-scavenging abilities of flower and leaf extracts measured at pH 1.2 were 47.37% and 47.18%, respectively, at a concentration of 1 mg/mL, which were higher than those of the whole plant and root extracts. Tyrosinase inhibition activity of the leaf extract at a concentration of 1 mg/mL was the highest (34.22%) and that of the whole plant and root extracts was shown to be more than 20%. These results suggest that ethanol extracts from different parts of Taraxacum officinale could be used as antioxidative functional food sources.

민들레 꽃, 잎, 뿌리, 전초의 부위별 항산화 활성과 생리활성을 탐색하기 위해 에탄올 추출물에서 총 플라보노이드와 총 폴리페놀 함량을 측정하였으며 항산화 활성 그리고 tyrosinase 억제 활성을 분석하였다. 총 플라보노이드 함량은 잎 추출물이 41.66 mg/g으로 다른 부위 추출물보다 높았고 총 폴리페놀 함량은 꽃 추출물이 71.91 mg/g으로 가장 많이 함유하는 것으로 나타났다. 전자공여능은 1 mg/mL의 농도에서 잎, 꽃, 전초 그리고 뿌리 추출물에서 각각 92.25%, 88.18%, 84.55%, 83.40%로 높은 활성을 나타내었으며 농도 의존적으로 활성이 유의하게 증가되었다. SOD 유사활성능은 1.0 mg/mL의 농도에서 부위별 추출물이 8.40~11.20%를 나타내었으며 꽃 추출물의 활성이 가장 높은 것으로 나타났다. pH 1.2 조건에서 측정한 아질산염 소거능은 1 mg/mL의 농도에서 꽃과 잎 추출물이 각각 47.37%와 47.18%로 전초와 뿌리보다 높았다. Tyrosinase 저해 활성은 1 mg/mL의 농도에서 잎 추출물이 34.22%로 가장 높았으며 전초와 뿌리 추출물에서도 20% 이상의 저해 활성이 나타났다. 이상의 결과 민들레 꽃, 잎, 뿌리 및 전초 에탄올 추출물이 우수한 항산화 활성을 지녀 이를 기능성 건강식품의 소재로 활용할 수 있다고 사료된다.

Keywords

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