Stomatal regulation prevents plants from critical water potentials during drought: Result of a model linking soil–plant hydraulics to abscisic acid dynamics

• Published in: Ecohydrology Vol. 15; no. 5
• Main Authors: Wankmüller, Fabian J. P., Carminati, Andrea
• Format: Journal Article
• Language: English
• Published: Oxford Wiley Subscription Services, Inc 01.07.2022
• Subjects: Abscisic acid; abscisic acid (ABA); Assimilation; Atmospheric conditions; Atmospheric correction; Atmospheric models; Cavitation; Drought; Environmental conditions; Fluid flow; Hydraulics; Leaves; Optimization models; Photosynthesis; Plants; root water uptake; Soil conditions; Soil conductivity; Soil dynamics; Soil properties; Soils; soil–plant hydraulics; Stomata; Stomatal conductance; stomatal regulation; Transpiration; Vapor pressure; Vapour pressure; Water loss; Water potential; Water shortages; Water supply; Xylem

Understanding stomatal regulation during drought is essential to correctly predict vegetation‐atmosphere fluxes. Stomatal optimization models posit that stomata maximize the carbon gain relative to a penalty caused by water loss, such as xylem cavitation. However, a mechanism that allows the stomata...