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Comparative Water Relations of Quercus acuta and Castanopsis cuspidata var sieboldii in Early Winter

붉가시나무(Quercus acuta)와 구실잣밤나무(Castanopsis cuspidata var, sieboldii)의 초겨울 비교 수분 관계

  • 박범진 (청주대학교 생명유전통계학부 생명과학) ;
  • 박용삼 (청주대학교 생명유전통계학부 생명과학) ;
  • 박용목 (청주대학교 생명유전통계학부 생명과학)
  • Published : 2005.08.30

Abstract

Comparative water relations of Quercus acuta and Castanopsis cuspidata var, sieboldii were analyzed to assess their resistance to drought and low temperature stresses from early November to early December, As air temperature decreased both species showed an increased content of osmotically active solute concentration per unit of dry weight (NS/DW), leading to lower osmotic potential of both species at both full turgid state $(OP_{sat})$ and turgor loss point $(OP_{tlp})$ in December than November. No major difference in the ability to adjust osmotically was noticed between the two. This finding suggests that both species must respond adaptively under water and low temperature stresses to maintain turgor pressure in winter season. In addition to osmotic adjustment, a low bulk modulus of elasticity $(E_{max})$ shown in Castanopsis cuspidata var. sieboldii must also play an important role in turgor maintenance during winter season being apt to happen water and low temperature stresses in plants.

Keywords

Castanopsis cuspidata var. sieboldii;Drought resistance;Low temperature stress;Osmotic adjustment;Quercus acuta

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