Natural variation in response to combined water and nitrogen deficiencies in Arabidopsis
2024
Xue, Zeyun | Ferrand, Marina | Gilbault, Elodie | Zurfluh, Olivier | Clément, Gilles | Marmagne, Anne | Huguet, Stéphanie | Jiménez-Gómez, José | Krapp, Anne | Meyer, Christian | Loudet, Olivier | Institut Jean-Pierre Bourgin - Sciences du végétal (IJPB) ; AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Institut des Sciences des Plantes de Paris-Saclay (IPS2 (UMR_9213 / UMR_1403)) ; Université d'Évry-Val-d'Essonne (UEVE)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Oxford Academic | ANR-15-CE20-0006,stressnet,Génetique de prochaine génération pour identifier les réseaux de régulation impliqués dans la réponse aux stress abiotiques (simples et combinés) chez Arabidopsis(2015) | ANR-17-EURE-0007,SPS-GSR,Ecole Universitaire de Recherche de Sciences des Plantes de Paris-Saclay(2017)
International audience
Show more [+] Less [-]English. Understanding plant responses to individual stresses does not mean that we understand real world situations, where stresses usually combine and interact. These interactions arise at different levels, from stress exposure to the molecular networks of the stress response. Here, we built an in-depth multi-omics description of plant responses to mild water (W) and nitrogen (N) limitations, either individually or combined, among five genetically different Arabidopsis (Arabidopsis thaliana) accessions. We highlight the different dynamics in stress response through integrative traits such as rosette growth and the physiological status of the plants. We also used transcriptomics and metabolomics profiling during a stage when the plant response was stabilized to determine the wide diversity in stress-induced changes among accessions, highlighting the limited reality of a ‘universal’ stress response. The main effect of the WxN interaction was an attenuation of the N-deficiency syndrome when combined with mild drought, but to a variable extent depending on the accession. Other traits subject to WxN interactions are often accession-specific. Multi-omics analyses identified a subset of transcript–metabolite clusters that are critical to stress responses but essentially variable according to the genotype factor. Including intra-specific diversity in our descriptions of plant stress response places our findings in perspective.
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