ArticleAnnals of botany2022
Root pressure-volume curve traits capture rootstock drought tolerance.
Article in Annals of botany, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed.
- Key sources of uncertainty in process-based modeling of live fuel moisture content.The New phytologist · 2026Article
- Acquisitive root exploration strategies help maintain higher peak sap flux rates during summer drought, but more root biomass does not.The New phytologist · 2026Article
- Rootstock genotype shapes whole-plant 3-D architecture and biomass allocation in field-grown grapevines.Annals of botany · 2025Article
- Differential physiological responses of resistant and susceptible grape cultivars to Eutypa dieback.Journal of experimental botany · 2025Article
- Root system ideotypes: what is the potential for breeding drought-tolerant grapevine rootstocks?Journal of experimental botany · 2025Review
- Pressure-volume curves of fine roots reveal intraspecific variation across different elevations in a subalpine forest.Journal of plant research · 2025Article
- Article
- Cessation of berry growth coincides with leaf complete stomatal closure at pre-veraison for grapevine (Vitis vinifera) subjected to progressive drought stress.Annals of botany · 2023Article
- Towards grapevine root architectural models to adapt viticulture to drought.Frontiers in plant science · 2023Article
- Divergent leaf and fine root "pressure-volume relationships" across habitats with varying water availability.Plant physiology · 2022Article
- Coordination of hydraulic thresholds across roots, stems, and leaves of two co-occurring mangrove species.Plant physiology · 2022Article
- A time-honoured technique goes underground to investigate root drought tolerance. A commentary on: 'Root pressure-volume curve traits capture rootstock drought tolerance'.Annals of botany · 2022Article
- Strategies of tree species to adapt to drought from leaf stomatal regulation and stem embolism resistance to root properties.Frontiers in plant science · 2022Review
- Expression of PotatoFrontiers in plant science · 2022Article
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6 authors.
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No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsLiving root tissues significantly constrain plant water uptake under drought, but we lack functional traits to feasibly screen diverse plants for variation in the drought responses of these tissues. Water stress causes roots to lose volume and turgor, which are crucial to root structure, hydraulics and growth. Thus, we hypothesized that root pressure-volume (p-v) curve traits, which quantify the effects of water potential on bulk root turgor and volume, would capture differences in rootstock drought tolerance.
methodsWe used a greenhouse experiment to evaluate relationships between root p-v curve traits and gas exchange, whole-plant hydraulic conductance and biomass under drought for eight grapevine rootstocks that varied widely in drought performance in field trials (101-14, 110R, 420A, 5C, 140-Ru, 1103P, Ramsey and Riparia Gloire), grafted to the same scion variety (Vitis vinifera 'Chardonnay'). KEY
resultsThe traits varied significantly across rootstocks, and droughted vines significantly reduced root turgor loss point (πtlp), osmotic potential at full hydration (πo) and capacitance (C), indicating that roots became less susceptible to turgor loss and volumetric shrinkage. Rootstocks that retained a greater root volume (i.e. a lower C) also maintained more gas exchange under drought. The rootstocks that previous field trials have classified as drought tolerant exhibited significantly lower πtlp, πo and C values in well-watered conditions, but significantly higher πo and πtlp values under water stress, than the varieties classified as drought sensitive.
conclusionsThese findings suggest that acclimation in root p-v curve traits improves gas exchange in persistently dry conditions, potentially through impacts on root hydraulics or root to shoot chemical signalling. However, retaining turgor and volume in previously unstressed roots, as these roots deplete wet soil to moderately negative water potentials, could be more important to drought performance in the deep, highly heterogenous rooting zones which grapevines develop under field conditions.
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