Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Antioxidative Activity and Flavonoid Content of Chrysanthemum zawadskii Flowers

구절초 꽃의 항산화 활성 및 플라보노이드 함량

  • Hyun, Mi-Ran (Department of Food Science and Nutrition, Soonchunhyang University) ;
  • Lee, Young-Sang (Department of Medical Biotechnology, Soonchunhyang University) ;
  • Park, Young-Hyun (Department of Food Science and Nutrition, Soonchunhyang University)
  • 현미란 (순천향대학교 식품영양학과) ;
  • 이영상 (순천향대학교 의료생명공학과) ;
  • 박영현 (순천향대학교 식품영양학과)
  • Received : 2010.01.27
  • Accepted : 2011.01.03
  • Published : 2011.02.28
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Abstract

To identify and quantify the major antioxidants present in Chrysanthemum zawadskii var. latilobum (C. zawadskii, hereafter), the flowers of C. zawadskii were cut into pieces, extracted with methanol (MeOH), and fractionated by using n-hexane, chloroform ($CHCl_3$), ethyl acetate (EtOAc), n-butanol (n-BuOH), and water. The highest concentration of polyphenol and flavonoid was observed in the EtOAc fraction. Based on ABTS and DPPH methods, highest antioxidative activities of C. zawadskii were found in the EtOAc fraction, in their 81.56% and 68.12% levels, respectively. By using HPLC, we identified two flavonoids: quercetin and luteolin, in the EtOAc fraction, and their contents were 20.02 and 1.65 $mg{\cdot}g^{-1}$, respectively. Our results clearly suggest the presence of these antioxidants in the flower of C. zawadskii, thus it may be consumed as tea with health beneficial effects.

본 연구는 차로써 이용이 증대되고 있는 구절초 꽃의 항산화 능력과 이와 관련된 유효한 성분을 탐색하고자 수행되었다. 구절초 꽃을 MeOH로 추출한 수율은 16%였고, MeOH 추출물을 다시 용매별로 분획한 결과 잔류 water > n-hexane > EtOAc > n-BuOH > $CHCl_3$ 분획물 순으로 추출수율을 보였다. 총 polyphenol 함량은 EtOAc분획물이 $195mg{\cdot}g^{-1}$으로 가장 높았고 그 다음으로 MeOH 추출물, $CHCl_3$, 잔류 water, n-BuOH, n-hexane 분획물 순으로 높게 나왔다. Flavonoid 함량 역시 EtOAc 분획물이 $143mg{\cdot}g^{-1}$으로 가장 높게 나타났으며 그 다음으로는 n-BuOH, n-hexane, 메탄올, 잔류 water, $CHCl_3$ 분획물 순으로 높았다. 구절초의 전자공여능과 총 항산화력 측정에서는 추출물의 농도가 높아질수록 활성이 증가하였으며 EtOAc 분획물이 $100{\mu}g{\cdot}mL^{-1}$에서 81.56%, 68.12%의 가장 높은 전자공여능 및 총 항산화력을 나타내었다. 구절초 MeOH 추출물과 EtOAc분획물을 HPLC로 분석한 결과 flavonoid 유효성분으로 quercetin과 luteolin이 확인되었으며 EtOAc 분획물 경우 각각의 함량이 $20.02mg{\cdot}g^{-1}$, $1.65mg{\cdot}g^{-1}$이었다. 이상의 결과를 종합해볼 때, 구절초 꽃의 항산화력은 MeOH 추출물의 EtOAc 분획에 포함된 quercetin에 주로 기인하는 것으로 판단되었다.

Keywords

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