Genetic variability and plasticity of plant allometry

Autor: François Vasseur, Cyrille Violle, Brian J. Enquist, Denis Vile
Přispěvatelé: Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM), Écophysiologie des Plantes sous Stress environnementaux (LEPSE), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), University of Arizona, Santa Fe Institute, Association Nationale de la Recherche et de la Technologie, Grant/Award Number: 0398/2009-09 42 008, H2020 European Research Council, Grant/Award Number: ERC-StG-2020-949843 PHENOVIGOUR, Région Occitanie Pyrénées-Méditerranée, Grant/Award Number: FEDER FSE IEJ 2014- 2020, ANR-17-CE02-0018,AraBreed,Exploration des réponses évolutives des plantes à des changements environnementaux à la lumière des théories écologiques : un test expérimental chez l'espèce modèle Arabidopsis thaliana(2017), European Project: 639706,H2020,ERC-2014-STG,CONSTRAINTS(2015)
Rok vydání: 2023
Předmět:
Zdroj: Functional Ecology
Functional Ecology, In press, ⟨10.1111/1365-2435.14281⟩
ISSN: 1365-2435
0269-8463
Popis: International audience; The metabolic scaling theory (MST) predicts quasi-universal trait-size relationships in plants, characterised by a unique allometric exponent within and across large taxonomic scales. However, recent studies have identified variability in allometric relationships, without a clear understanding of the modulating role played by genetic variation and environment.Here, we investigated (1) the allometric relationships for two central traits of MST, namely total leaf area and plant growth rate, in the model species Arabidopsis thaliana, (2) the variability of plant allometries between genotypes and (3) the plastic responses of plant allometries under water deficit, high temperature and their interaction.Using a population of 120 genotypes, we found that intraspecific allometries adhered on average with MST predictions. However, a broad variability but a moderate plasticity in the allometric exponents was observed across genotypes and environments. Allometric exponents were impacted significantly, yet weakly, by water deficit, but not by high temperature. Moreover, genotypes that deviated from MST predictions exhibited more plasticity in trait-size relationships than genotypes that followed MST predictions.Our study suggests that plant allometry is genetically variable and might be related to different adaptive strategies to cope with stressing conditions. Thus, our results highlights the need of assessing trait-size relationships within species to understand the mechanisms of plant adaptation to contrasted environments.
Databáze: OpenAIRE
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