AustralieFrV1, Main, Exploration, bibRecord, 001447

Visual quantification of embolism reveals leaf vulnerability to hydraulic failure.

Identifieur interne : 001447 ( Main/Exploration ); précédent : 001446; suivant : 001448

Visual quantification of embolism reveals leaf vulnerability to hydraulic failure.

Auteurs : Timothy J. Brodribb [Australie] ; Robert P. Skelton [Australie] ; Scott A M. Mcadam [Australie] ; Diane Bienaimé [France] ; Christopher J. Lucani [Australie] ; Philippe Marmottant [France]

Source :

The New phytologist [ 1469-8137 ] ; 2016.

RBID : pubmed:26742653

Descripteurs français

KwdFr :
- Angiospermes (physiologie), Dessiccation, Eau, Feuilles de plante (physiologie), Imagerie tridimensionnelle, Spécificité d'espèce, Xylème (physiologie).
MESH :
- physiologie : Angiospermes, Feuilles de plante, Xylème.
- Dessiccation, Eau, Imagerie tridimensionnelle, Spécificité d'espèce.

English descriptors

KwdEn :
- Angiosperms (physiology), Desiccation, Imaging, Three-Dimensional, Plant Leaves (physiology), Species Specificity, Water, Xylem (physiology).
MESH :
- chemical : Water.
- physiology : Angiosperms, Plant Leaves, Xylem.
- Desiccation, Imaging, Three-Dimensional, Species Specificity.

Abstract

Vascular plant mortality during drought has been strongly linked to a failure of the internal water transport system caused by the rapid invasion of air and subsequent blockage of xylem conduits. Quantification of this critical process is greatly complicated by the existence of high water tension in xylem cells making them prone to embolism during experimental manipulation. Here we describe a simple new optical method that can be used to record spatial and temporal patterns of embolism formation in the veins of water-stressed leaves for the first time. Applying this technique in four diverse angiosperm species we found very strong agreement between the dynamics of embolism formation during desiccation and decline of leaf hydraulic conductance. These data connect the failure of the leaf water transport network under drought stress to embolism formation in the leaf xylem, and suggest embolism occurs after stomatal closure under extreme water stress.

DOI: 10.1111/nph.13846
PubMed: 26742653

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">Vascular plant mortality during drought has been strongly linked to a failure of the internal water transport system caused by the rapid invasion of air and subsequent blockage of xylem conduits. Quantification of this critical process is greatly complicated by the existence of high water tension in xylem cells making them prone to embolism during experimental manipulation. Here we describe a simple new optical method that can be used to record spatial and temporal patterns of embolism formation in the veins of water-stressed leaves for the first time. Applying this technique in four diverse angiosperm species we found very strong agreement between the dynamics of embolism formation during desiccation and decline of leaf hydraulic conductance. These data connect the failure of the leaf water transport network under drought stress to embolism formation in the leaf xylem, and suggest embolism occurs after stomatal closure under extreme water stress.</div>
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Serveur d'exploration sur les relations entre la France et l'Australie

Visual quantification of embolism reveals leaf vulnerability to hydraulic failure.

Visual quantification of embolism reveals leaf vulnerability to hydraulic failure.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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	Serveur d'exploration sur les relations entre la France et l'Australie
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