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Stem Water Potential is a Sensitive Indicator of Grapevine Water Status
Annals of Botany · 2001 · Vol. 87(4) · pp. 477–483
Xavier Choné✉(Université de Bordeaux)
Abstract
Dawn leaf water potential (dawnΨ), leaf water potential (leafΨ) and stem water potential (stemΨ) were measured on mature leaves to determine non-irrigated vine water status in vineyards during the growing season. StemΨ was the most discriminating indicator for both moderate and severe water deficits. The difference between stemΨ and leafΨ (ΔΨ) provided an indirect measurement of mean leaf transpiration which varied with soil moisture conditions and vapour pressure deficit in the atmosphere. The use of stemΨ as an indicator for grapevine management in both non-irrigated and irrigated vineyards is discussed. Copyright 2001 Annals of Botany Company
Horticultural and Viticultural ResearchPlant Water Relations and Carbon DynamicsPlant Physiology and Cultivation StudiesBiologyTranspirationVineVapour Pressure DeficitWater contentWater useGrowing seasonHorticultureAgronomyBotany
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