Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Contents of low molecular weight antioxidants in the leaves of different sweetpotato cultivars at harvest

고구마 품종별 수확시기 잎의 저분자항산화물질 함량분석

  • Ahn, Young-Ock (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Kim, Sun-Ha (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Lee, Haeng-Soon (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Lee, Joon-Seol (Bioenergy Crop Research Center, National Crop Research Institute, RDA) ;
  • Ma, Daifu (Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences (CAAS)) ;
  • Kwak, Sang-Soo (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
  • 안영옥 (한국생명공학연구원 환경바이오연구센터) ;
  • 김선하 (한국생명공학연구원 환경바이오연구센터) ;
  • 이행순 (한국생명공학연구원 환경바이오연구센터) ;
  • 이준설 (국립식량과학원 바이오에너지작물센터) ;
  • 마다이푸 (중국농업과학원 고구마연구소) ;
  • 곽상수 (한국생명공학연구원 환경바이오연구센터)
  • Published : 2009.09.30
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Abstract

Sweetpotato [Ipomoea batatas (L.) Lam] leaves are excellent source of low molecular weight antioxidants such as polyphenols, anthocyanins and carotenoids compared to other leafy vegetables. Endogenous antioxidants in sweetpotato help our bodies to prevent ageing, heart diseases and cancer. In this study, to develop the proper cultivars for the functional feed materials, we investigated the contents of anthocyanin, $\beta$-carotene, and polyphenols as well as DPPH radical scavenging activity in leaves of 14 different cultivars at the time of the harvest. They showed a diverse antioxidation activity. In DPPH radical scavenging activity, cultivars of Nanjing 9, Yulmi and Shinzami showed higher activity, whereas cv. Huiza 6 showed the lowest. Cultivars of Shinzami and Shinhwangmi had the highest anthocyanin (3.5 mg/g fr wt) and polyphenol (15.8 mg/g fr wt) content, respectively. Interestingly, there was a high correlation between cultivars with colorful pigments in storage roots and antioxidants activity in leaves. These results suggest that sweetpotato leaves with high antioxidant activity at harvest would be suitable for functional feed materials.

Keywords

References

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