Early root-root interactions weaken foliar defense responses against Septoria tritici blotch in a durum wheat varietal mixture
Language
en
Document de travail - Pré-publication
This item was published in
2025-08-02
English Abstract
The 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 ...Read more >
The 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.Read less <
English Keywords
Durum wheat
Triticum turgidum
Septoria tritici blotch
varietal mixtures
plant-plant interactions
belowground processes
competition
ANR Project
Mobilizing and Breeding Intra and inter-specific crop Diversity for a systemic change towards pesticide-free agriculture - ANR-20-PCPA-0006
Analyse du compromis croissance/défense chez le blé dur - ANR-19-CE20-0005
Analyse du compromis croissance/défense chez le blé dur - ANR-19-CE20-0005
Origin
Hal importedCollections