作者
John S Sperry, Martin D Venturas, William RL Anderegg, Maurizio Mencuccini, D Scott Mackay, Yujie Wang, David M Love
发表日期
2017/6
期刊
Plant, cell & environment
卷号
40
期号
6
页码范围
816-830
简介
Stomatal regulation presumably evolved to optimize CO2 for H2O exchange in response to changing conditions. If the optimization criterion can be readily measured or calculated, then stomatal responses can be efficiently modelled without recourse to empirical models or underlying mechanism. Previous efforts have been challenged by the lack of a transparent index for the cost of losing water. Yet it is accepted that stomata control water loss to avoid excessive loss of hydraulic conductance from cavitation and soil drying. Proximity to hydraulic failure and desiccation can represent the cost of water loss. If at any given instant, the stomatal aperture adjusts to maximize the instantaneous difference between photosynthetic gain and hydraulic cost, then a model can predict the trajectory of stomatal responses to changes in environment across time. Results of this optimization model are consistent with the widely used …
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JS Sperry, MD Venturas, WRL Anderegg… - Plant, cell & environment, 2017