保卫细胞以其特殊的胞壁结构调控着植物的光合作用和蒸腾作用，在植物生命活动中起着重要的作用。
Guard cell regulates photosynthesis and transpiration, which play an important role in the life of plant, with their special cell wall structure.
用的“称重法”测定了水稻的蒸腾作用。 用FQW-CO_2红外气体分析仪测定了小麦的光合强度。
The Transpiration was measured by "Weight Method" of HBAHOB. The photosynthesis was measured by FQW-CO2 infrared gas analyser.
气孔运动机制及光合作用和蒸腾作用对环境变化响应的差异是叶片水平WUE的生理基础；
The mechanism of stoma and the differences of the correspondence of photosynthesis and transpiration to environmental changes were the physiological basis of WUE at leaf level.
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