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Early root-root interactions weaken foliar defense responses against Septoria tritici blotch in a durum wheat varietal mixture

hal.structure.identifierPlant Health Institute of Montpellier [UMR PHIM]
dc.contributor.authorMATHIEU, Laura
hal.structure.identifierPlant Health Institute of Montpellier [UMR PHIM]
dc.contributor.authorCHLOUP, Amandine
hal.structure.identifierPlant Health Institute of Montpellier [UMR PHIM]
dc.contributor.authorMARTY, Soline
hal.structure.identifierPlant Health Institute of Montpellier [UMR PHIM]
dc.contributor.authorSAVAJOLS, Justin
hal.structure.identifierMetaboHUB-Bordeaux
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorROUVEYROL, Claudia
hal.structure.identifierPlateforme Bordeaux Metabolome
hal.structure.identifierUnité de Recherche Œnologie [Villenave d'Ornon] [OENO]
dc.contributor.authorVALLS, Josep
hal.structure.identifierPlateforme Bordeaux Metabolome
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorPÉTRIACQ, Pierre
hal.structure.identifierPlant Health Institute of Montpellier [UMR PHIM]
dc.contributor.authorMOREL, Jean-Benoît
hal.structure.identifierPlant Health Institute of Montpellier [UMR PHIM]
dc.contributor.authorMÉTEIGNIER, Louis Valentin
hal.structure.identifierPlant Health Institute of Montpellier [UMR PHIM]
dc.contributor.authorBALLINI, Elsa
dc.date.issued2025-08-02
dc.description.abstractEnThe interactions between co-cultivated plant cultivars are increasingly recognized as influencing their susceptibility to pathogens in mixtures. However, the underlying mechanisms remain largely unexplored. Using a model of durum wheat cultivar mixtures where susceptibility to Septoria foliar disease is increased, we combined aerial and root phenotyping with transcriptional analyses and untargeted metabolomics to elucidate the potential signaling cascade driving this modulation of susceptibility. We observed contrasting root architectures between cultivars in mixture. Molecular analysis showed a delayed induction of defense-related genes and metabolites following pathogen inoculation in plants grown in mixture compared to pure stand. The findings suggest that root architecture potentially triggers a competitive response that could delay the induction of defense responses following pathogen inoculation. Altogether, these results point to a possible interplay between root architecture, resource competition, plant metabolism, and defense modulation in shaping plant–pathogen interactions within varietal mixtures.
dc.description.sponsorshipMobilizing and Breeding Intra and inter-specific crop Diversity for a systemic change towards pesticide-free agriculture - ANR-20-PCPA-0006
dc.description.sponsorshipAnalyse du compromis croissance/défense chez le blé dur - ANR-19-CE20-0005
dc.language.isoen
dc.subject.enDurum wheat
dc.subject.enTriticum turgidum
dc.subject.enSeptoria tritici blotch
dc.subject.envarietal mixtures
dc.subject.enplant-plant interactions
dc.subject.enbelowground processes
dc.subject.encompetition
dc.title.enEarly root-root interactions weaken foliar defense responses against Septoria tritici blotch in a durum wheat varietal mixture
dc.typeDocument de travail - Pré-publication
dc.identifier.doi10.1101/2025.07.30.667709
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale/Botanique
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale/Phytopathologie et phytopharmacie
dc.subject.halSciences du Vivant [q-bio]/Ecologie, Environnement/Interactions entre organismes
hal.identifierhal-05222729
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-05222729v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2025-08-02&rft.au=MATHIEU,%20Laura&CHLOUP,%20Amandine&MARTY,%20Soline&SAVAJOLS,%20Justin&ROUVEYROL,%20Claudia&rft.genre=preprint


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