VALCU, Cristina-Maria; LALANNE, Céline; PLOMION, Christophe; SCHLINK, Katia

doi:10.1002/pmic.200700992

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VALCU, Cristina-Maria
Technische Universität Munchen - Technical University Munich - Université Technique de Munich [TUM]

LALANNE, Céline
Biodiversité, Gènes & Communautés [BioGeCo]

PLOMION, Christophe
Biodiversité, Gènes & Communautés [BioGeCo]

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Article de revue

Ce document a été publié dans

Proteomics. 2008, vol. 8, n° 20, p. 4287-4302

Wiley-VCH Verlag

Résumé en anglais

Although tree species typically exhibit low genetic differentiation between populations, ecotypes adapted to different environmental conditions can vary in their capacity to withstand and recover from environmental stresses like heat stress. Two month old seedlings of a Picea abies ecotype adapted to high elevation showed lower level of thermotolerance and higher level of tolerance to oxidative stress relative to a low elevation ecotype. Protein expression patterns following exposure to severe heat stress of the two ecotypes were compared by means of 2-DE. Several proteins exhibiting ecotype and tissue specific expression were identified by MS/MS. Among them, small heat shock proteins of the HSP 20 family and proteins involved in protection from oxidative stress displayed qualitative and quantitative differences in expression between the ecotypes correlated with the observed phenotypic differences. On the basis of these results, it can be speculated that the observed interpopulation polymorphism of protein regulation in response to heat stress could underlie their different capacities to withstand and recover from heat stress. These local adaptations are potentially relevant for the species adaptation to the conditions predicted by the current models for climate change.< Réduire

Mots clés

PICEA ABIES

EPICEA COMMUN

Mots clés en anglais

ECOTYPE

OXIDATIVE STRESS

SMALL HSP

THERMOTOLERANCE