Abstract:

There was heterogeneous distribution in stomatal conductance（gs）and stomatal aperture for both high and low light leaves of Ligustrum sinense Lour. in four designated positions within a leaf. Linear or exponential or polynomial relationships between gs and stomatal aperture were found when regression of gs and stomatal aperture was established. Statistical analysis revealed that the relationship between gs and stomatal aperture for high light leaves was more significant than that of low light leaves. A linear relationship between gs and stomatal aperture existed in both positions 1 and 3 for both high and low light leaves. The stomatal density of the low light leaves was much lower than that of the high light leaves. The sensitivity of stomata to changing environment for high light leaves was higher than that for low light leaves, which may also relate to the higher stomatal density for the high light leaves.

适应不同光环境小蜡叶片气孔导度、气孔开度和气孔密度的时空变化
张守仁* 马克平 陈灵芝

（中国科学院植物研究所植被数量生态学开放研究实验室，北京100093）

摘要： 对生长在强光环境和弱光环境小蜡叶片的气孔参数测定发现：气孔导度和气孔开度在4个取样部位存在异质性分布。气孔导度和气孔开度经回归分析呈线性、指数或多项式分布。统计分析表明：强光下的叶片气孔导度和气孔开度的相关性明显高于弱光环境叶片的数值。无论强光环境还是弱光环境下的叶片，在取样部位编号为1和3，其气孔导度和气孔开度均存在显著的线性关系。弱光环境下叶片的气孔密度要远低于强光环境下的叶片。强光环境下叶片对变化环境的敏感性要大于弱光环境下的叶片，这可能与强光环境叶片具有较高的气孔密度有关。
关键词： 适应；气体交换；光环境；显微镜技术；气孔异质性

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Key words: acclimation, gas exchange, light environment, microscopy, stomatal heterogeneity