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Locally adapted oak populations along an elevation gradient display different molecular strategies to regulate bud phenology

Locally adapted oak populations along an elevation gradient display different molecular strategies to regulate bud phenology

Authors :
Antoine Kremer
Isabelle Lesur
Jean-Marc Aury
Sylvain Delzon
Karine Labadie
Grégoire Le Provost
Jean-Marc Louvet
Corinne Da Silva
Céline Lalanne
Christophe Plomion
Biodiversité, Gènes & Communautés (BioGeCo)
Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
HelixVenture
CEA- Saclay (CEA)
Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
Génomique métabolique (UMR 8030)
Genoscope - Centre national de séquençage [Evry] (GENOSCOPE)
Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA))
Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA))
Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS)
Publication Year :
2021
Publisher :
HAL CCSD, 2021.

Abstract

Research conductedWith the ongoing global warming, there are serious concerns about the persistence of locally adapted populations. Indeed, with the raising of temperature, the phenological cycle of tree species may be strongly affected since higher winter temperatures may have a negative impact on endodormancy release if chilling requirements are not fulfilled during winter and late frost in spring may expose trees if buds flush too early. Thus, Environmental gradients (showing continuous variations of environmental conditions) constitute a design of choice to analyze the effect of winter dormancy in locally adapted population.MethodsIn the present study, we used an elevation gradient in the Pyrenees to explore the gene expression network involved in dormancy regulation in natural populations of sessile oak locally adapted to temperature. Terminal buds were harvested during dormancy induction and release at different elevations. Then, gene expression was quantified using RNAseq and we used a likelihood ratio test to identify genes displaying significant dormancy, elevation or dormancy-by-elevation interaction effects.Key resultsOur results highlight molecular processes in locally adapted populations along this elevation cline, and made it possible to identify key dormancy-by-elevation responsive genes revealing that locally adapted populations have evolved distinct molecular strategies to adapt their bud phenology in response to environmental variation (i.e. temperature).

Details

Language :
English
Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....bf066e31d5f87f4d924a4fd8a3b0843e