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盐胁迫对枸杞光合作用的气孔与非气孔限制
引用本文:郑国琦,许兴,等.盐胁迫对枸杞光合作用的气孔与非气孔限制[J].西北植物学报,2002,22(6):1355-1359.
作者姓名:郑国琦  许兴
作者单位:1. 宁夏大学农学院农学系,宁夏永宁,750105;宁夏农业生物技术重点实验室,银川,750002
2. 宁夏农业生物技术重点实验室,银川,750002
3. 宁夏大学农学院农学系,宁夏永宁,750105
基金项目:国家重点基础研究发展规划项目 ( G19990 1170 5)
摘    要:NaCl胁迫后,枸杞叶片的Pn,gs,Tr随盐浓度的增加呈现下降趋势。在0.08%-0.6%的NaCl胁迫范围内,枸杞叶片的Ci降低,Ls升高,gs下降主要受气孔限制,这可能由于盐刺激根系产生的某些物理或化学信号运输到地上部所致;而在盐分浓度大于0.6%的胁迫条件下,枸杞叶片的Ci则升高,Ls降低,gs下降的原因是由于Na^ ,Cl^-的大量积累对光合酶活性产生直接的毒害作用,从而使非气孔限制因素成为主要限制因子。

关 键 词:盐胁迫  枸杞  光合作用  非气孔限制  净光合速率  气孔限制
文章编号:1000-4025(2002)06-1355-05
修稿时间:2001年9月25日

The effect of salt stress on the stomatal and non-stomatal limitation of photosynthesis of Lycium barbarum
ZHENG Guo qi,XU Xing,XU Zhao zheng,LIU Zhen rong.The effect of salt stress on the stomatal and non-stomatal limitation of photosynthesis of Lycium barbarum[J].Acta Botanica Boreali-Occidentalia Sinica,2002,22(6):1355-1359.
Authors:ZHENG Guo qi  XU Xing  XU Zhao zheng  LIU Zhen rong
Institution:ZHENG Guo qi 2,1,XU Xing 2,XU Zhao zheng 1,LIU Zhen rong 1
Abstract:With the increasing of NaCl concentration,the Pn,gs,Tr of Lycium barbarum was decreased respectively after treated.When the concentration of NaCl was less than 0.6%,the Ci of Lycium barbarum leaf was decreased,while Ls increased.The main cause of gs decreasing was that some physical and chemical signal from root inducted by salt decreased the stomatal conductance of Lycium barbarum .On the contrary,when the concentration of NaCl was more than 0.6%,the Ci was increased,Ls decreased yet.The main cause was that photosynthetic enzyme was damaged by surplus Na +?Cl - accumulated in the wolf berry leaf,therefore,the non stomatal limitation became the main factor.
Keywords:NaCl  wolf berry  Pn  stomatal limitation  non  stomatal limitation
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