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The poorly-explored stomatal response to temperature at constant evaporative demand
Colleen Mills1, Megan K Bartlett2, Thomas N Buckley1
1Department of Plant Sciences, University of California, Davis, USA.
Plant, Cell & Environment
|April 11, 2024
Summary
Stomata directly respond to temperature (DRST) by adjusting ambient humidity. This review synthesizes current knowledge on DRST, its mechanisms, and impacts on plant water and carbon exchange.
Area of Science:
- Plant physiology
- Environmental science
- Biophysics
Background:
- Leaf temperature influences stomatal behavior due to changes in the leaf-to-air water vapor gradient (Δw).
- The direct response of stomata to temperature (DRST), independent of Δw, is less understood.
- Existing data on DRST are limited and show considerable variation, hindering generalization.
Purpose of the Study:
- To review the current understanding of the direct response of stomata to temperature (DRST).
- To explore hypothesized biophysical mechanisms underlying DRST.
- To discuss the implications of DRST for plant adaptation and climate change impacts.
Main Methods:
- Literature review of existing studies on DRST.
- Analysis of hypothesized biophysical mechanisms.
- Discussion of ecological and climatological implications.
Main Results:
- The direct response of stomata to temperature (DRST) is poorly characterized.
- Available data suggest a generally positive DRST, but with high variability.
- Numerous biophysical mechanisms for DRST have been proposed but not widely confirmed.
Conclusions:
- Further research is needed to elucidate the direct response of stomata to temperature (DRST).
- Understanding DRST is crucial for predicting plant responses to climate change.
- DRST may significantly influence plant-atmosphere carbon and water exchange.
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