High Temperature Stress of Summer Chinese Cabbage in Alpine Region

고랭지 여름배추의 고온장해 원인 해석

  • Hwang, Seon-Woong (Division of Plant Nutrition, National Institute of Agricultural Science and Technology, RDA) ;
  • Lee, Ju-Young (Division of Plant Nutrition, National Institute of Agricultural Science and Technology, RDA) ;
  • Hong, Sung-Chang (Division of Plant Nutrition, National Institute of Agricultural Science and Technology, RDA) ;
  • Park, Yang-Ho (Division of Plant Nutrition, National Institute of Agricultural Science and Technology, RDA) ;
  • Yun, Seung-Gil (Department of Plant Resources Science, Hankyong National University) ;
  • Park, Moon-Hee (Division of Plant Nutrition, National Institute of Agricultural Science and Technology, RDA)
  • 황선웅 (농촌진흥청 농업과학기술원 식물영양과) ;
  • 이주영 (농촌진흥청 농업과학기술원 식물영양과) ;
  • 홍성창 (농촌진흥청 농업과학기술원 식물영양과) ;
  • 박양호 (농촌진흥청 농업과학기술원 식물영양과) ;
  • 윤승길 (한경대학교 식물자원과학과) ;
  • 박문희 (농촌진흥청 농업과학기술원 식물영양과)
  • Received : 2003.09.09
  • Accepted : 2003.11.28
  • Published : 2003.12.30

Abstract

The objective of this study was to assess the regime of heat shock protein and leaf temperature caused by high temperature stress in chinese cabbage grown in alpine region. In monsoon period, high temperature and heavy rain have caused a stress condition for the cultured higher plants. Chinese cabbages were grown in different altitude, i.e. 600 m and 1,100 m. It was demonstrated that heat shock protein (Hsp 90) in alpine chinese cabbage leaf was actively expressed by high temperature and surplus nitrogen application. As a results of thermo-graphically observed leaf temperatures, chinese cabbage grown in high altitude region were ranged from 20.5 to $24.3^{\circ}C$ while in low altitude from 24.0 to $31.5^{\circ}C$. Furthermore, analysis of assimilated nutrients indicated that total nitrogen content was higher in plant grown under high temperature than under low temperature.

고랭지 여름배추의 고온장해원인을 구명하기 위하여 표고별로 배추시료를 채취하여 Hsp, 엽온 분포 및 무기성분 함량을 조사하였다. Hsp는 표고가 낮고 과비를 한 배추 잎에서 더 많이 발현되었고 엽온도 표고 1,100 m에서 재배한 정상적인 배추보다 생리장해를 받은 배추에서 훨씬 더 높았다. 또한 배추 잎에서 즙액 중의 $NO_3-N$ 및 산분해한 CaO 함량만 낮았을 뿐 질소, 인산, 칼리, 고토 등과 같은 대부분의 무기성분 함량은 정상적인 배추보다 훨씬 높았다. 이상의 결과로 볼 때, 표고가 낮은 지대에서 발생하는 배추의 생리장해는 고온이 주원인이므로 해발고도에 따라 배추재배시기를 조절하여야 되며, 특히 과다한 비료를 표층시비하면 고온장해를 가중시킬 우려가 있으므로 반드시 토양검정에 의하여 적정량의 비료를 시용해야 고온장해를 경감시킬 수 있을 것으로 판단된다.

Keywords

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