摘要
根据气孔运动的基本理论和实验,建立一个模拟气孔对环境水分状况响应的机理模型。应用计算机对模型中的方程进行求解,获得叶片导度、叶片主体水势以及叶内水势差等生理变量随土壤水势和大气与叶片间的水汽浓度差而变化的曲面。通过本模型的结果,对于气孔对环境水分状况的响应作一般的解释。同时,深入分析和讨论气孔对叶-气水汽压差响应的一些可能机制。
A simulation model of stomatal response to change of environmental water status was set up based on the works on the mechanism of stomaral movement.The variations of leaf con- ductance,water potential and turgor pressure in guard cells,subsidiary cells and the other cells or tissues in leaf with leaf-air vapour pressure difference and soil water potential have been calculated by our model.The calculated results fit very well with the data from experiments. The different patterns of leaf transpiration variation with the difference between leaf-air and vapour pressure can be explained quantitatively.
关键词
叶片导度
环境水分状况
模拟
Leaf conductance
Environmental water status
Simulation
