Journal
FRONTIERS IN PLANT SCIENCE
Volume 12, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2021.644810
Keywords
Triticum aestivum; susceptibility factors; Fusarium head blight; strain aggressiveness; plant-pathogen interactions
Categories
Funding
- Region Auvergne-Rhone-Alpes
- FEDER
- Agence Nationale de la Recherche of the French government through the program Investissements d'Avenir [16-IDEX-0001 CAP 20-25]
- Agence Nationale de la Recherche of the French government through PPR Cultivate and protect differently investment program SUCSEED
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The study found that different wheat cultivars exhibit variations in susceptibility to Fusarium head blight (FHB), but share common characteristics in the core proteome. Susceptibility changes are mainly influenced by genotype-dependent factors, while shared molecular adjustments are independent of the aggressiveness of F. graminearum strains.
Fusarium head blight (FHB), mainly occurring upon Fusarium graminearum infection in a wide variety of small-grain cereals, is supposed to be controlled by a range of processes diverted by the fungal pathogen, the so-called susceptibility factors. As a mean to provide relevant information about the molecular events involved in FHB susceptibility in bread wheat, we studied an extensive proteome of more than 7,900 identified wheat proteins in three cultivars of contrasting susceptibilities during their interaction with three F. graminearum strains of different aggressiveness. No cultivar-specific proteins discriminated the three wheat genotypes, demonstrating the establishment of a core proteome regardless of unequivocal FHB susceptibility differences. Quantitative protein analysis revealed that most of the FHB-induced molecular adjustments were shared by wheat cultivars and occurred independently of the F. graminearum strain aggressiveness. Although subtle abundance changes evidenced genotype-dependent responses to FHB, cultivar distinction was found to be mainly due to basal abundance differences, especially regarding the chloroplast functions. Integrating these data with previous proteome mapping of the three F. graminearum strains facing the three same wheat cultivars, we demonstrated strong correlations between the wheat protein abundance changes and the adjustments of fungal proteins supposed to interfere with host molecular functions. Together, these results provide a resourceful dataset that expands our understanding of the specific molecular events taking place during the wheat-F. graminearum interaction.
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