干旱胁迫条件下臭柏的气孔蒸腾与角质层蒸腾  

Stomatal transpiration and cuticular transpiration of Sabina vulgaris under drought stress

作　　者：温国胜[1] 张国盛[2] 张明如[2] 王林和[2] 吉川贤[3] 

机构地区：[1]浙江林学院生命科学学院,浙江临安311300 [2]内蒙古农业大学林学院,内蒙古呼和浩特010019 [3]冈山大学农学部

出　　处：《浙江林学院学报》2003年第3期268-272,共5页Journal of Zhejiang Forestry College

基　　金：国家自然科学基金资助项目(30240033)

摘　　要：为了探讨臭柏Sabinavulgaris的耐旱机理,运用切枝蒸腾法,室内实验和野外调查相结合,测定了干旱胁迫条件下臭柏的气孔蒸腾和角质层蒸腾。室内实验是将臭柏插穗带往日本冈山大学扦插,生根扦插苗移植于砾耕栽培装置中,设置对照区、弱干旱胁迫区和强干旱胁迫区(培养液渗透势分别为0MPa、-0 1MPa和-0 3MPa)3种处理进行长期的干旱胁迫室内模拟实验。野外调查是在中国毛乌素沙地土壤水分条件不同的沙丘上部和沙丘下部选择供试样品进行测定。结果表明,气孔蒸腾是臭柏水分消耗的主要形式。在干旱胁迫条件下,臭柏的气孔更加敏感,迅速地关闭,降低蒸腾速率,以减少水分的散失。To discuss the drought resistance mechanism of Sabina vulgaris,stomatal transipiration and cuticular transpiration of Sabina vulgaris are measured with the transpiration method of cut branch,greenhouse experiments and field survey being combined.In Okayama University of Japan,longterm simulation experiment in greehouse are conducted with three different treatments:control,light stress,strong stress in water culture systems,in which concentrations of solutions are 0 MPa,-01 MPa and -03 MPa respectively.Field survey is conducted with the samples from upper and lower parts of dune with different soil water contents at Mowusu Sandy Land in China.The results show that stomatal transpiration is the major form of water consumption of Sabina vulgaris.Under drought stress,stomas close sensitively and quickly to decrease the transpiration rate and the loss of water.

关 键 词：植物学 臭柏 干旱胁迫 气孔蒸腾 角质层蒸腾 

分 类 号：S718.43[农业科学—林学] Q945.172[生物学—植物学]