气孔导度的波动：环境增益的影响。
Oscillations in stomatal conductance: the influence of environmental gain.
机构信息
Department of Environmental Biology, Research School of Biological Sciences, Australian National University, Canberra City, A.C.T., Australia.
出版信息
Plant Physiol. 1974 Nov;54(5):769-72. doi: 10.1104/pp.54.5.769.
It is supposed that oscillations in stomatal conductance are associated with the dynamic properties of the loop in which rate of evaporation affects, through physiological processes, the aperture of stomata and stomatal aperture in turn affects rate of evaporation. It is therefore predicted that their occurrence must be influenced by the magnitude of what is termed environmental gain: the sensitivity of rate of evaporation to change in leaf conductance to vapor transfer. Two methods of manipulating gain, and their effects on stomatal behavior in cotton (Gossypium hirsutum L. cv. Deltapine Smooth Leaf), are described. In the first, gain was increased by decreasing ambient humidity; in the second, it was made zero by regulating ambient humidity to keep rate of evaporation constant despite changes in conductance. The results are in accord with the supposition.
据推测，气孔导度的波动与循环的动态特性有关，在这个循环中，蒸发速率通过生理过程影响气孔的开度，而气孔开度反过来又影响蒸发速率。因此，可以预测，它们的发生必须受到所谓环境增益的大小的影响：即蒸发速率对叶片蒸汽传输导度变化的敏感性。本文描述了两种控制增益的方法及其对棉花（Gossypium hirsutum L. cv. Deltapine Smooth Leaf）气孔行为的影响。在第一种方法中，通过降低环境湿度来增加增益；在第二种方法中，通过调节环境湿度使蒸发速率保持不变，尽管导度发生了变化，从而使增益为零。结果与假设一致。
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