What question did this study set out to answer?

To test whether stomatal control of transpiration is coordinated with hydraulic failure from xylem embolism during drought, and to establish how stomatal timing affects plant mortality.

September 18, 2017Ecology LettersOpen Access

Plant resistance to drought depends on timely stomatal closure

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Authors

NMNicolas Martin‐StPaulInstitut National de la Recherche Agronomique SDSylvain DelzonCentre National de la Recherche Scientifique HCHervé CochardUniversité Clermont Auvergne

Discussion

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Implication

Meta-analysis and hydraulic modeling reveal a critical threshold for stomatal closure in plants during drought, indicating safety margins increase with embolism resistance.

Key Points

To test whether stomatal control of transpiration is coordinated with hydraulic failure from xylem embolism during drought, and to establish how stomatal timing affects plant mortality.
Conducted a meta-analysis of functional plant traits governing stomatal responses to drought and xylem embolism resistance.
Coupled empirical trait data with simulations using a soil-plant hydraulic model to evaluate plant survival dynamics.
Identified an absolute functional limit for the timing of stomatal closure required to prevent rapid plant death during drought.
Observed that the water potential inducing stomatal closure matched the xylem pressure at embolism onset in only a small subset of species, with hydraulic safety margins increasing continuously as embolism resistance increased.

Cite This Study

Martin‐StPaul et al. (2017) studied this question.

synapsesocial.com/papers/69c2a4fcce60d783a6e84233 https://doi.org/10.1111/ele.12851

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September 18, 2017Ecology LettersOpen Access

Plant resistance to drought depends on timely stomatal closure

View Full Paper

Ask AI

Bookmark

Authors

NMNicolas Martin‐StPaulInstitut National de la Recherche Agronomique SDSylvain DelzonCentre National de la Recherche Scientifique HCHervé CochardUniversité Clermont Auvergne

Discussion

Member takes

Implication

Meta-analysis and hydraulic modeling reveal a critical threshold for stomatal closure in plants during drought, indicating safety margins increase with embolism resistance.

Key Points

To test whether stomatal control of transpiration is coordinated with hydraulic failure from xylem embolism during drought, and to establish how stomatal timing affects plant mortality.
Conducted a meta-analysis of functional plant traits governing stomatal responses to drought and xylem embolism resistance.
Coupled empirical trait data with simulations using a soil-plant hydraulic model to evaluate plant survival dynamics.
Identified an absolute functional limit for the timing of stomatal closure required to prevent rapid plant death during drought.
Observed that the water potential inducing stomatal closure matched the xylem pressure at embolism onset in only a small subset of species, with hydraulic safety margins increasing continuously as embolism resistance increased.

Cite This Study

Martin‐StPaul et al. (2017) studied this question.

synapsesocial.com/papers/69c2a4fcce60d783a6e84233 https://doi.org/10.1111/ele.12851

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