ArticlePlant physiology2025
Extension of the triphasic water potential curve: Accounting for air vapor pressure deficit under soil water stress.
Article in Plant physiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
2 citing papers in PubMed.
- Focus issue editorial: ecophysiology.Plant physiology · 2026Article
- Molecular Mechanisms and Experimental Strategies for Understanding Plant Drought Response.Plants (Basel, Switzerland) · 2026Review
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2 authors.
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Abstract
For woody plants subjected to soil dehydration, physiological thresholds of drought-induced stomatal closure (i.e. minimum stomatal conductance, gs-min) and turgor loss point (TLP) can be derived from the triphasic relationship of stem water potential (Ψ) at midday and predawn, i.e. the "Ψ-curve". In this study, we provide an extension of the Ψ-curve approach that accounts for vapor pressure deficit (VPD). Experimental data were collected in a greenhouse for potted hazelnut (Corylus avellana) trees (varieties "Jefferson" and "Yamhill")-a species known for its VPD-sensitivity. Consistent with the original Ψ-curve, the "VPD-adjusted" Ψ-curve exhibited a triphasic shape. Predicted thresholds of Θ1' and Θ2' were comparable to independent measures of gs-min (-0.86 "Jefferson"; -1.16 MPa "Yamhill") and TLP (-1.76 MPa "Jefferson"; -2.06 MPa "Yamhill"), respectively. In conclusion, the extended Ψ-curve approach allows the separatation of soil from atmospheric water stress when predicting physiological thresholds using stem water potential.
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