1. Natural variation of Arabidopsis thaliana responses to Cauliflower mosaic virus infection upon water deficit
- Author
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Bergès, Sandy, Vasseur, François, Bediée, Alexis, Rolland, Gaëlle, Masclef, Diane, Dauzat, Myriam, van Munster, Manuella, Vile, Denis, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Écophysiologie des Plantes sous Stress environnementaux (LEPSE), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, 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), Biologie et Génétique des Interactions Plante-Parasite (UMR BGPI), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, 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)-Université de Montpellier (UM)-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 SupAgro, rant #2015005464 from European Union and the Region LanguedocRoussillon 'Chercheur d'Avenir' (FEDER FSE IEJ 2014-2020, Project APSEVIR)., Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), 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)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Université Paul-Valéry - Montpellier 3 (UPVM)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)
- Subjects
Leaves ,Genotype ,QH301-705.5 ,Arabidopsis Thaliana ,[SDV]Life Sciences [q-bio] ,Arabidopsis ,Plant Pathogens ,Plant Science ,Brassica ,Research and Analysis Methods ,Microbiology ,Plant Viral Pathogens ,Model Organisms ,Caulimovirus ,Plant and Algal Models ,Virology ,Plant Resistance to Abiotic Stress ,Plant-Environment Interactions ,Natural Resources ,[SDV.BV]Life Sciences [q-bio]/Vegetal Biology ,Plant Defenses ,Biology (General) ,Flowering Plants ,ComputingMilieux_MISCELLANEOUS ,Plant Diseases ,Dehydration ,Ecology ,Plant Anatomy ,Plant Ecology ,Ecology and Environmental Sciences ,fungi ,Organisms ,Genetic Variation ,Biology and Life Sciences ,Eukaryota ,food and beverages ,Plants ,Plant Pathology ,RC581-607 ,[SDV.BV.PEP]Life Sciences [q-bio]/Vegetal Biology/Phytopathology and phytopharmacy ,[SDV.BV.AP]Life Sciences [q-bio]/Vegetal Biology/Plant breeding ,Experimental Organism Systems ,Plant Physiology ,Animal Studies ,Water Resources ,Immunologic diseases. Allergy ,Viral Transmission and Infection ,Research Article - Abstract
Plant virus pathogenicity is expected to vary with changes in the abiotic environment that affect plant physiology. Conversely, viruses can alter the host plant response to additional stimuli from antagonism to mutualism depending on the virus, the host plant and the environment. Ecological theory, specifically the CSR framework of plant strategies developed by Grime and collaborators, states that plants cannot simultaneously optimize resistance to both water deficit and pathogens. Here, we investigated the vegetative and reproductive performance of 44 natural accessions of A. thaliana originating from the Iberian Peninsula upon simultaneous exposure to soil water deficit and viral infection by the Cauliflower mosaic virus (CaMV). Following the predictions of Grime’s CSR theory, we tested the hypothesis that the ruderal character of a plant genotype is positively related to its tolerance to virus infection regardless of soil water availability. Our results showed that CaMV infection decreased plant vegetative performance and annihilated reproductive success of all accessions. In general, water deficit decreased plant performance, but, despite differences in behavior, ranking of accessions tolerance to CaMV was conserved under water deficit. Ruderality, quantified from leaf traits following a previously published procedure, varied significantly among accessions, and was positively correlated with tolerance to viral infection under both well-watered and water deficit conditions, although the latter to a lesser extent. Also, in accordance with the ruderal character of the accession and previous findings, our results suggest that accession tolerance to CaMV infection is positively correlated with early flowering. Finally, plant survival to CaMV infection increased under water deficit. The complex interactions between plant, virus and abiotic environment are discussed in terms of the variation in plant ecological strategies at the intraspecific level., Author summary Virus pathogenicity may be influenced by changes in the abiotic environment. A common change is decrease in soil water availability, which is detrimental to plant productivity and the occurrence of which is expected to increase due to climate change, has recently been shown to interfere with plant–virus interactions. We investigated the performance of 44 natural accessions of the plant species Arabidopsis thaliana infected by Cauliflower mosaic virus under well-watered and water deficit conditions. We showed that viral infection decreased plant vegetative performance and annihilated reproductive success of all accessions, and that these pathogenic effects were increased by water deficit. Intrinsic characteristics of the accessions were related to their tolerance to the virus so that accessions with low leaf tissue density and rapid growth rate were more tolerant to viral infection regardless of watering condition. Finally, plant survival upon viral infection increased under water deficit. We discuss the role of intrinsic plant characteristics, seen as ecological strategies, in plant tolerance to viral infections under contrasting environmental conditions, and the consequences for the study of viral epidemiology.
- Published
- 2020