LOBO, Albin; TORRES RUIZ, Jose Manuel; BURLETT, Régis; LEMAIRE, Cédric; PARISE, Camille; FRANCIONI, Claire; TRUFFAUT, Laura; TOMASKOVA, Ivana; HANSEN, Jon Kehlet; KJAER, Erik Dahl; KREMER, Antoine; DELZON, Sylvain

doi:10.1016/j.foreco.2018.04.031

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LOBO, Albin
Department of Geosciences and Natural Resource Management [Copenhagen] [IGN]

TORRES RUIZ, Jose Manuel
Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
Biodiversité, Gènes & Communautés [BioGeCo]

BURLETT, Régis
Biodiversité, Gènes & Communautés [BioGeCo]

Langue

Article de revue

Ce document a été publié dans

Forest Ecology and Management. 2018, vol. 424, p. 53-61

Elsevier

Résumé en anglais

The genus Quercus comprises important species in forestry not only for their productive value but also for their ability to withstand drought. Hence an evaluation of inter- and intraspecific variation in drought tolerance is important for selecting the best adapted species and provenances for future afforestation. However, the presence of long vessels makes it difficult to assess xylem vulnerability to embolism in these species. Thanks to the development of a flow centrifuge equipped with a large rotor, we quantified (i) the between species variability of embolism resistance in four native and two exotic species of oaks in Europe and (ii) the within species variability in Quercus petraea. Embolism resistance varied significantly between species, with the pressure inducing 50% loss of hydraulic conductivity (P-50) ranging between -7.0 and -4.2 MPa. Species native to the Mediterranean region were more resistant than pan-European species. In contrast, intraspecific variability in embolism resistance in Q. petraea was low within provenances and null between provenances. A positive correlation between P-50 and vessel diameter among the six oak species indicates that the more embolism resistant species had narrower xylem vessels and a higher amount of hydraulic bridges between vessels. However, this tradeoff between hydraulic efficiency and safety was not observed between Q. petraea provenances.< Réduire

Mots clés

xylème

quercus

embolisme

résistance à la sécheresse

changement climatique

Mots clés en anglais

Plant hydraulics

Xylem embolism

Drought resistance

Climate change

Oaks

stress-induced cavitation

induced tree mortality

petraea matt liebl

fagus-sylvatica l.

quercus-robur l

climate-change

water-stress

phenotypic plasticity

hydraulic failure

woody-plants

Forestry

xylem

global change

DOI

http://dx.doi.org/10.1016/j.foreco.2018.04.031

Project ANR

Plateforme d'Innovation " Forêt-Bois-Fibre-Biomasse du Futur "
COntinental To coastal Ecosystems: evolution, adaptability and governance - ANR-10-LABX-0045

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202