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Poster

Session: Session 2 Presenting Authors at Posters (Evens)

P-418 - Metabolic profiling of root responses to bacterial communities in susceptible and resistant grapevine varieties to Plasmopara viticola: insights into induced systemic immunity

Thursday, July 17, 2025
13:30 - 15:15  
Location: Confex Hall 3
Plant Regulation of biotic and abiotic stress – trade-offs

    Presenting Author(s)

  • LP

    Leonie Poncelet

    PhD Student
    Université de Reims Champagne Ardenne,INRAE, RIBP, USC 1488, 51100 Reims, France
    Reims, Champagne-Ardenne, France

    • Author(s)

  • MM

    Marisa MAIA

    Grapevine Pathogen Systems Lab, Biosystems & Integrative Sciences Institute, Departamento de Biologia Vegetal, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
    Lisboa, Lisboa, Portugal

  • MD

    Morgane DURET

    Université de Reims Champagne-Ardenne, INRAE, RIBP, USC 1488, 51100 Reims, France
    Reims, Champagne-Ardenne, France

  • VC

    Vincent CARRE

    Université de Lorraine, LCP-A2MC, F-57000 Metz, France
    Metz, Lorraine, France

  • AA

    Aziz AZIZ

    Université de Reims Champagne-Ardenne, INRAE, RIBP, USC 1488, 51100 Reims, France
    Reims, Champagne-Ardenne, France

The plant roots are the primary interface and a source of signals for plant-rhizospheric microbe interactions and for root-to-shot-communication. Such interactions may shape specific bacterial communities and modulate both root and systemic metabolome. Some beneficial bacteria can trigger systemic immunity against a wide range of foliar diseases by activating plant defences, thereby reducing plant susceptibility to pathogen attack. However, the role of induced root metabolic change and network in the systemic immunity remains unclear. In this study, we performed whole root metabolic profiling in two grapevine varieties differing in their susceptibility to Plasmopara viticola, through FT-ICR/MS and MALDI-MSI approaches, to better understand the relationship between metabolic signatures and systemic immunity against P. viticola. The results showed distinct metabolic profiles between the roots of the resistant variety compared to the susceptible one after pathogen infection. Most of these metabolites fell into functional categories, such as flavonoids and carbohydrates. The roots of both grapevine varieties respond to bacterial communities with common and different metabolic clusters, which seem to be related to priming state of plants for enhanced resistance to P. viticola. These results provide new insights into the root-specific metabolic signatures including stilbenic phytoalexins to the genetic and induced systemic resistance against P. viticola.