Oak stands along an elevation gradient have different molecular strategies for regulating bud phenology

BMC Plant Biology

Research

Thomas Moritz¹  Karine Labadie²  Corinne Da Silva³  Jean-Marc Aury³  Antoine Kremer⁴  Gregoire Le Provost⁴  Jean-Marc Louvet⁴  Céline Lalanne⁴  Sylvain Delzon⁴  Christophe Plomion⁴  Isabelle Lesur⁵ 

[1] Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, 901 87, Umeå, Sweden;Genoscope, Institut François Jacob, CEA, Université Paris-Saclay, Evry, France;Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, 91057, Evry, France;INRAE, Univ. Bordeaux, BIOGECO, F-33610, Cestas, France;INRAE, Univ. Bordeaux, BIOGECO, F-33610, Cestas, France;Helix Venture, F-33700, Mérignac, France;

关键词: Response to temperature;    Bud phenology;    Elevation cline;    Gene expression;    Hormone quantification;    Sessile oak;   

DOI  :  10.1186/s12870-023-04069-2

 received in 2022-09-29, accepted in 2023-01-16,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundGlobal warming raises serious concerns about the persistence of species and populations locally adapted to their environment, simply because of the shift it produces in their adaptive landscape. For instance, the phenological cycle of tree species may be strongly affected by higher winter temperatures and late frost in spring. Given the variety of ecosystem services they provide, the question of forest tree adaptation has received increasing attention in the scientific community and catalyzed research efforts in ecology, evolutionary biology and functional genomics to study their adaptive capacity to respond to such perturbations.ResultsIn the present study, we used an elevation gradient in the Pyrenees Mountains to explore the gene expression network underlying dormancy regulation in natural populations of sessile oak stands sampled along an elevation cline and potentially adapted to different climatic conditions mainly driven by temperature. By performing analyses of gene expression in terminal buds we identified genes displaying significant dormancy, elevation or dormancy-by-elevation interaction effects. Our Results highlighted that low- and high-altitude populations have evolved different molecular strategies for minimizing late frost damage and maximizing the growth period, thereby increasing potentially their respective fitness in these contrasting environmental conditions. More particularly, population from high elevation overexpressed genes involved in the inhibition of cell elongation and delaying flowering time while genes involved in cell division and flowering, enabling buds to flush earlier were identified in population from low elevation.ConclusionOur study made it possible to identify key dormancy-by-elevation responsive genes revealing that the stands analyzed in this study have evolved distinct molecular strategies to adapt their bud phenology in response to temperature.

【 授权许可】

CC BY   
© The Author(s) 2023

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