COCHARD, Hervé; DELZON, Sylvain; BADEL, Eric

doi:10.1111/pce.12391

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

COCHARD, Hervé
Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]

DELZON, Sylvain
Biodiversité, Gènes & Communautés [BioGeCo]

BADEL, Eric
Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]

Langue

Article de revue

Ce document a été publié dans

Plant, Cell and Environment. 2015, vol. 38, n° 1, p. 201-206

Wiley

Résumé en anglais

As current methods for measuring xylem embolism in trees are indirect and prone to artefacts, there is an ongoing controversy over the capacity of trees to resist or recover from embolism. The debate will not end until we get direct visualization of the vessel content. Here, we propose desktop X-ray microtomography (micro-CT) as a reference direct technique to quantify xylem embolism and thus validate more widespread measurements based upon either hydraulic or acoustic methods. We used desktop micro-CT to measure embolism levels in dehydrated or centrifuged shoots of laurel – a long-vesseled species thought to display daily cycles of embolism formation and refilling. Our direct observations demonstrate that this Mediterranean species is highly resistant to embolism and is not vulnerable to drought-induced embolism in a normal range of xylem tensions. We therefore recommend that embolism studies in long-vesseled species should be validated by direct methods such as micro-CT to clear up any misunderstandings on their physiology.< Réduire

Mots clés en anglais

cavitation

imaging

methods

xylem physiology

Métadonnées

Partager cette publication !

Licence d’utilisation du document

X-ray microtomography (micro-CT): a reference technology for high-resolution quantification of xylem embolism in trees

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

DOI

Origine

Unités de recherche