Unraveling how mycorrhizal inoculation shapes the wheat foliar transcriptome and enhances resistance to septoria tritici blotch
| Title: | Unraveling how mycorrhizal inoculation shapes the wheat foliar transcriptome and enhances resistance to septoria tritici blotch |
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| Authors: | Delaeter, Mathieu; Lucau-Danila, Anca; Randoux, Béatrice; Magnin-Robert, Maryline; Lounès - Hadj Sahraoui, Anissa |
| Contributors: | Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV); Université du Littoral Côte d'Opale (ULCO); BioEcoAgro - Equipe 5 - Specialized Metabolites of Plant Origin; BioEcoAgro - UMR transfrontalière INRAe - UMRT1158; Université d'Artois (UA)-Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich (ULiège)-Université de Picardie Jules Verne (UPJV)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-JUNIA (JUNIA); Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Université d'Artois (UA)-Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich (ULiège)-Université de Picardie Jules Verne (UPJV)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-JUNIA (JUNIA); Université catholique de Lille (UCL)-Université catholique de Lille (UCL); Société Française de Phytopathologie (SFP) |
| Source: | Journées Jean Chevaugeon 2026 (JJC) - 15e Rencontres de Phytopathologie - Mycologie ; https://hal.science/hal-05462383 ; Journées Jean Chevaugeon 2026 (JJC) - 15e Rencontres de Phytopathologie - Mycologie, Société Française de Phytopathologie (SFP), Jan 2026, Aussois, France |
| Publisher Information: | CCSD |
| Publication Year: | 2026 |
| Subject Terms: | [SDE]Environmental Sciences; [SDV]Life Sciences [q-bio] |
| Subject Geographic: | Aussois; France |
| Description: | International audience ; Arbuscular mycorrhizal fungi (AMF), known to form mutualistic associations with most terrestrial plant species, could represent promising ecological alternatives to agrochemicals, which are harmful to both human health and environment. Although most studies investigate the effectiveness of mycorrhizal symbiosis in controlling root diseases, its influence on foliar diseases is still poorly explored, particularly in wheat. A prior investigation conducted under controlled conditions revealed that inoculation with the AMF species Funneliformis mosseae (Fm) protects wheat leaves from both pathogenic fungi, the biotrophic Blumeria graminis f. sp. tritici, responsible for powdery mildew (Mustafa et al, 2016, 2017), and the hemibiotrophic Zymoseptoria tritici (Zt), causing septoria tritici blotch (STB). This protection seems to be linked to the activation of "Mycorrhiza-Induced Resistance" (MIR), facilitating the systemic induction of plant defenses mediated by AMF (Allario et al., 2025). Nonetheless, the metabolic alterations that contribute to this resistance are poorly understood. In this study, we performed transcriptomic analyses to investigate how mycorrhizal symbiosis impacts gene expression in wheat leaves, resulting in plant protection against STB. Leaves from 6-week-old seedlings, inoculated or not with Fm and/or Zt, were sampled to study gene expression, 48 hours after Zt spores inoculation. Transcriptomic data showed a systemic induction of numerous genes in leaves of mycorrhizal plants under non-infectious conditions, many of which were common to those induced by Zt inoculation in non-mycorrhizal plants. These genes were involved in proteolysis, antioxidant mechanisms and plant immune response, particularly linked to jasmonic acid and ethylene signalling pathways. This induction of specific defense mechanisms by Fm before Zt inoculation (cell wall thickening, stomatal closure, defense proteins, maintenance of homeostasis and cellular function) was later completed by a downregulation ... |
| Document Type: | conference object |
| Language: | English |
| Availability: | https://hal.science/hal-05462383 |
| Accession Number: | edsbas.94CE8D41 |
| Database: | BASE |