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Change of amino acids contents of Gastrodia elata Blume with harvest times and seed tuber

수확시기와 자마의 특성별 천마의 아미노산 함량 변화

  • Kim, Hyun-Tae (Division of Forest Biotechnology, Korea Forest Research Institute) ;
  • Park, Eung-Jun (Division of Forest Biotechnology, Korea Forest Research Institute)
  • 김현태 (국립산림과학원 산림생명공학과) ;
  • 박응준 (국립산림과학원 산림생명공학과)
  • Received : 2014.10.16
  • Accepted : 2014.12.20
  • Published : 2014.12.31

Abstract

Gastrodia elata Blume, an achlorophyllous orchid plant, has been used in traditional medicine and harvests in spring and fall. Here we investigated the quantitative changes of amino acids in G. elata by harvest times and seed tubers. In the results, we found that there was not big difference in contents of total amino acids but the distribution of amino acids differed depending on harvest times. 19% of total amino acids were asparagin and valine, an essential amino acid, occupied 10% within total amino acids in the tubers harvested in October. Among amino acids in the tubers harvested in April, serine occupied 23% and arginine, an essential amino acid, occupied 10% within total amino acids in tuber. Interestingly, the use of sexually propagated seed tubers produced high concentration of total amino acids compared to vegetatively propagated seed tubers. As for sexually propagated seed tubers, essential amino acids contents similar to the tubes harvested in October and nonessential amino acids contents similar to the tubers harvested in April. In this study, we found that amino acids contents in G. elata tubers altered depending on various cultivation practices. Therefore if these results can be applied to food industry, the value of G. elata as a natural food resource will be enhanced to a great extent.

천마는 난초과 식물로서 예로부터 약용으로 사용되어 왔으며, 봄과 가을에 수확을 한다. 본 연구에서는 천마의 수확시기와 자마의 특성에 따른 아미노산의 함량을 조사하였다. 결론적으로 수확시기에 따른 총 아미노산 함량에는 변화가 없었지만 각 아미노산의 함량은 차이가 있음을 확인하였다. 가을에 수확한 천마에서는 아스파라긴이 19%로 함량이 제일 높았으며, 필수 아미노산으로는 발린인 10%를 차지하였다. 봄에 수확한 천마에서는 세린이 23%로 가장 높은 함량을 보였으며, 필수 아미노산 중에는 아르기닌(10%)로 가장 높은 함량을 보였다. 자마의 특성별 아미노산 함량을 조사 했을 때, 유성증식 천마가 무성증식 천마에 비하여 총 아미노산 함량이 높은 것으로 나타났다. 유성증식 천마의 필수 아미노산은 가을에 수확한 무성증식 천마와 함량이 비슷한 것으로 나왔으며, 비필수 아미노산은 봄에 수확한 무성증식 천마와 함량이 비슷한 것으로 나왔다. 본 연구를 통하여서 천마의 다양한 재배 환경에 대한 아미노산 함량의 변화를 알 수 있었으며, 더 나아가 자연 식품 재료로서의 가치가 높아질것으로 판단이 된다.

Keywords

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