José Manuel Torres Ruiz
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View article: The Sequence of Drought‐Driven Stomatal Closure, Stem Xylem Embolism, Dehydration, and Aquaporin Gene Expression Differs Among Species
The Sequence of Drought‐Driven Stomatal Closure, Stem Xylem Embolism, Dehydration, and Aquaporin Gene Expression Differs Among Species Open
Stem dehydration is critical in predicting drought‐driven tree mortality. Yet, how it coordinates with stomatal closure, xylem embolism, and aquaporin‐mediated water transport regulation remains unknown. Two angiosperms (beech and olive) a…
View article: Xylem Pit Anatomy and Minimum Leaf Conductance Drive Drought Mortality in <i>Pinus pinaster</i>
Xylem Pit Anatomy and Minimum Leaf Conductance Drive Drought Mortality in <i>Pinus pinaster</i> Open
Drought‐triggered forest die‐off events are commonly attributed to hydraulic failure, carbon starvation, or a combination of the two. Nevertheless, the anatomical and physiological traits that make trees vulnerable to drought in the field …
View article: La Live-Box, un nouveau dispositif pour la mesure des cinétiques de transpiration à l’échelle plante entière
La Live-Box, un nouveau dispositif pour la mesure des cinétiques de transpiration à l’échelle plante entière Open
Pour étudier la résistance de plantes à la sécheresse, il faudrait pouvoir surveiller en continu différents traits physiologiques dont la conductance foliaire résiduelle (ou transpiration résiduelle), trait fonctionnel majeur. Or, les méth…
View article: Minimum leaf conductance during drought: unravelling its variability and impact on plant survival
Minimum leaf conductance during drought: unravelling its variability and impact on plant survival Open
Summary Leaf water loss after stomatal closure is key to understanding the effects of prolonged drought on vegetation. It is therefore important to accurately quantify such water losses to improve physiology‐based models of drought‐induced…
View article: Tree drought–mortality risk depends more on intrinsic species resistance than on stand species diversity
Tree drought–mortality risk depends more on intrinsic species resistance than on stand species diversity Open
Increasing tree diversity is considered a key management option to adapt forests to climate change. However, the effect of species diversity on a forest's ability to cope with extreme drought remains elusive. In this study, we assessed dro…
View article: The rates of starch depletion and hydraulic failure both play a role in drought-induced seedling mortality
The rates of starch depletion and hydraulic failure both play a role in drought-induced seedling mortality Open
Key message The elapsed times to deplete starch concentrations and to reach a null hydraulic safety margin were related to tree seedling mortality under experimental drought. Starch concentration showed an accelerated decline across all sp…
View article: Hydraulic plasticity and water use regulation act to maintain the hydraulic safety margins of Mediterranean trees in rainfall exclusion experiments
Hydraulic plasticity and water use regulation act to maintain the hydraulic safety margins of Mediterranean trees in rainfall exclusion experiments Open
Hydraulic failure due to xylem embolism has been identified as one of the main mechanisms involved in drought‐induced forest decline. Trees vulnerability to hydraulic failure depends on their hydraulic safety margin (HSM). While it has bee…
View article: Exploring the role of plant hydraulics in canopy fuel moisture content: insights from an experimental drought study on Pinus halepensis Mill. and Quercus ilex L.
Exploring the role of plant hydraulics in canopy fuel moisture content: insights from an experimental drought study on Pinus halepensis Mill. and Quercus ilex L. Open
Key Message Understanding the impact of extreme drought on the canopy fuel moisture content ( CFMC ) is crucial to anticipate the effects of climate change on wildfires. Our study demonstrates that foliage mortality, caused by leaf embolis…
View article: Negative pressure & fast embolism in biomimetic leaves
Negative pressure & fast embolism in biomimetic leaves Open
International audience
View article: The spreading of air embolism in tree leaves: High speed imaging
The spreading of air embolism in tree leaves: High speed imaging Open
International audience
View article: Air invasion in a biomimetic leaf-on-chip
Air invasion in a biomimetic leaf-on-chip Open
International audience
View article: Plant hydraulics at the heart of plant, crops and ecosystem functions in the face of climate change
Plant hydraulics at the heart of plant, crops and ecosystem functions in the face of climate change Open
Summary Plant hydraulics is crucial for assessing the plants' capacity to extract and transport water from the soil up to their aerial organs. Along with their capacity to exchange water between plant compartments and regulate evaporation,…
View article: Fluctuating selection and rapid evolution of oaks during recent climatic transitions
Fluctuating selection and rapid evolution of oaks during recent climatic transitions Open
Societal Impact Statement The rapidity of evolutionary changes in trees and whether this pace is sufficient to cope with ongoing climatic change are hotly debated issues in ecology today. Climate warming began in the mid‐19th century, afte…
View article: Photosynthesis, leaf hydraulic conductance and embolism dynamics in the resurrection plant <i>Barbacenia purpurea</i>
Photosynthesis, leaf hydraulic conductance and embolism dynamics in the resurrection plant <i>Barbacenia purpurea</i> Open
The main parameters determining photosynthesis are stomatal and mesophyll conductance and electron transport rate, and for hydraulic dynamics they are leaf hydraulic conductance and the spread of embolism. These parameters have scarcely be…
View article: Key hydraulic traits control the dynamics of plant dehydration in four contrasting tree species during drought
Key hydraulic traits control the dynamics of plant dehydration in four contrasting tree species during drought Open
Trees are at risk of mortality during extreme drought, yet our understanding of the traits that govern the timing of drought-induced hydraulic failure remains limited. To address this, we tested SurEau, a trait-based soil–plant–atmosphere …
View article: How much does VPD drive tree water stress and forest disturbances?
How much does VPD drive tree water stress and forest disturbances? Open
Vapor Pressure Deficit (VPD, atmospheric drought) and soil water potential (Ψsoil, soil drought) have both been reported to affect terrestrial plant water stress, plant functions (growth, stomatal conductance, transpiration) and vulnerabil…
View article: European forest vulnerability to hydraulic failure: an ecohydrological approach
European forest vulnerability to hydraulic failure: an ecohydrological approach Open
The current acceleration of climate change in Europe makes it essential to assess spatially the impact of drought and heat waves on forest disturbances risk (mortality, wildfire risk, etc…). Recent studies have shown that hydraulic f…
View article: Conifer desiccation in the 2021 NW heatwave confirms the role of hydraulic damage
Conifer desiccation in the 2021 NW heatwave confirms the role of hydraulic damage Open
The unprecedented heatwave that hit the Pacific northwest of North America in late June-early July 2021 impacted ecosystems and communities, yet evidence and analysis of this impact are still missing. Here we bring a unique dataset quantif…
View article: La technique optique pour suivre l'embolie estivale des arbres
La technique optique pour suivre l'embolie estivale des arbres Open
View article: A bitter future for coffee production? Physiological traits associated with yield reveal high vulnerability to hydraulic failure in <i>Coffea canephora</i>
A bitter future for coffee production? Physiological traits associated with yield reveal high vulnerability to hydraulic failure in <i>Coffea canephora</i> Open
The increase in frequency and intensity of drought events have hampered coffee production in the already threatened Amazon region, yet little is known about key aspects underlying the variability in yield potential across genotypes, nor to…
View article: Plant hydraulic modelling of leaf and canopy fuel moisture content reveals increasing vulnerability of a Mediterranean forest to wildfires under extreme drought
Plant hydraulic modelling of leaf and canopy fuel moisture content reveals increasing vulnerability of a Mediterranean forest to wildfires under extreme drought Open
Summary Fuel moisture content (FMC) is a crucial driver of forest fires in many regions world‐wide. Yet, the dynamics of FMC in forest canopies as well as their physiological and environmental determinants remain poorly understood, especia…
View article: On the path from xylem hydraulic failure to downstream cell death
On the path from xylem hydraulic failure to downstream cell death Open
Summary Xylem hydraulic failure (HF) has been identified as a ubiquitous factor in triggering drought‐induced tree mortality through the damage induced by the progressive dehydration of plant living cells. However, fundamental evidence of …
View article: Connection matters: exploring the implications of scion–rootstock alignment in grafted grapevines
Connection matters: exploring the implications of scion–rootstock alignment in grafted grapevines Open
Background and aims: grafting in viticulture has been essential since the advent of the phylloxera crisis at the end of the 19th century, but relatively little is known about the relevance of the quality of the connection at the grafting j…
View article: Leaf water potential measurements using the pressure chamber: Synthetic testing of assumptions towards best practices for precision and accuracy
Leaf water potential measurements using the pressure chamber: Synthetic testing of assumptions towards best practices for precision and accuracy Open
Leaf water potential ( ψ leaf ), typically measured using the pressure chamber, is the most important metric of plant water status, providing high theoretical value and information content for multiple applications in quantifying critical …
View article: Drought acclimation of <i>Quercus ilex</i> leaves improves tolerance to moderate drought but not resistance to severe water stress
Drought acclimation of <i>Quercus ilex</i> leaves improves tolerance to moderate drought but not resistance to severe water stress Open
Increasing temperature and drought can result in leaf dehydration and defoliation even in drought‐adapted tree species such as the Mediterranean evergreen Quercus ilex L. The stomatal regulation of leaf water potential plays a central role…
View article: Mechanisms of woody-plant mortality under rising drought, CO2 and vapour pressure deficit
Mechanisms of woody-plant mortality under rising drought, CO2 and vapour pressure deficit Open
View article: Post-drought conditions and hydraulic dysfunction determine tree resilience and mortality across Mediterranean Aleppo pine (<i>Pinus halepensis</i>) populations after an extreme drought event
Post-drought conditions and hydraulic dysfunction determine tree resilience and mortality across Mediterranean Aleppo pine (<i>Pinus halepensis</i>) populations after an extreme drought event Open
Drought-related tree mortality is a global phenomenon that currently affects a wide range of forests. Key functional variables on plant hydraulics, carbon economy, growth and allocation have been identified and play a role in tree drought …
View article: High variation in hydraulic efficiency but not xylem safety between roots and branches in four temperate broad‐leaved tree species
High variation in hydraulic efficiency but not xylem safety between roots and branches in four temperate broad‐leaved tree species Open
Xylem hydraulic safety and efficiency are key traits determining tree fitness in a warmer and drier world. While numerous plant hydraulic studies have focused on branches, our understanding of root hydraulic functioning remains limited, al…
View article: Hydraulic failure and tree mortality: from correlation to causation
Hydraulic failure and tree mortality: from correlation to causation Open
View article: Why do trees take more risks in the Amazon?
Why do trees take more risks in the Amazon? Open
Rowland et al. (2015) published recently in Nature a study suggesting that "death from drought in tropical forests is triggered by hydraulics not carbon starvation". We have reanalyzed they data with the objective of placing them in a more…