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 Different Species Lycium chinensis Miller Extracts by Harvest Time

수확시기가 다른 품종별 구기자 추출물의 항산화 효과

  • Park, Soo-Jin (Dept. of Food Science & Nutrition, Hoseo University) ;
  • Park, Won-Jong (Dept. of Food Science & Technology, Kongju National University) ;
  • Lee, Bong-Chun (Chungnam A. T. A. Chungyang Aoxthorn Experimental Station) ;
  • Kim, Su-Dong (Chungnam A. T. A. Chungyang Aoxthorn Experimental Station) ;
  • Kang, Myung-Hwa (Dept. of Food Science & Nutrition, Hoseo University)
  • Published : 2006.09.01
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Abstract

In the present study, the Lycium chinensis Miller was harvested at intervals of one month in order to distinguish outstanding species and to determine optimal harvest time. From these harvests, extracts were prepared from ethanol. The total usable sugar, betaine, and phenolic acid contents as well as electron donating ability and SOD liked activity of the extracts were then measured. While sugar content of the Lycium chinensis Miller showed no significant difference among the various species examined, usable sugar content of the crop harvested in November was higher than that of the crop harvested in August. The Lycium chinensis Miller was picked in August, September, October, and November and analyzed for betaine content. According to this analysis, betaine content was higher in the crop harvested in November than in that harvested in August. In particular, considerable difference in betaine content per species or harvest time was exhibited. The SOD-liked activity in all of the Lycium chinensis Miller extracts showed an alleviation effect of at least 90%. In addition, there was no significant difference according to either species or harvest time. On the other hand, SOD liked activity was higher in November than in August.

본 연구는 구기자(Lycium chinesis Miller)의 우수품종을 선발하고 최적 수확시기를 결정하기 위하여 한달 간격으로 수확하여 구기자 추출물을 제조하였다. 이 추출물들의 가용성 당분, betaine, 총 페놀성 화합물의 함량, 전자공여능 및 SOD 유사활성을 측정하였다. 수확시기에 따라 구기자의 당도를 측정한 결과 품종간에는 큰 차이는 없었지만 8월에 수확하는 것보다 11월에 수확한 구기자의 가용성 당도가 높았다. Betaine 함량은 수확시기가 늦을수록 높은 활성을 나타내었다. 총 페놀화합물 함량은 청양재래, 불로 및 청대는 8월 수확한 품종이 가장 높았고, 장명, 청운 및 명안은 9월에 수확한 품종이 가장 높았다. 전자공여능은 수확시기가 늦을수록 우수한 것으로 나타났고, SOD 유사활성은 8월에 수확한 구기자보다 늦게 수확한 구기자에서 유의적으로 높게 나타났다.

Keywords

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