The pH regulator PacC: a host-dependent virulence factor in Botrytis cinerea - Archive ouverte HAL
Article Dans Une Revue Environmental Microbiology Reports Année : 2018

The pH regulator PacC: a host-dependent virulence factor in Botrytis cinerea

Résumé

The phytopathogenic fungus Botrytis cinerea is able to infect a wide variety of plants and plant tissues with differing chemical compositions. During its interaction with the host, this pathogen modulates its ambient pH by secreting acids or ammonia. In this work, we examined the Pal/Pac pathway, the fungal ambient pH‐responsive signalling circuit, and investigated the role of the PacC transcription factor. Characterization of the BcpacC deletion mutant revealed an alteration of both fungal growth and virulence depending on the pH of the culture medium or of the host tissue. The pathogenicity of the mutant was altered on plants exhibiting a neutral pH and not on plants with acidic tissues. The capacity of the mutant to acidify its environment and, more particularly, to produce oxalic acid was affected, as was production of reactive oxygen species. Finally, proteomic profiling of the mutant secretome revealed significant changes in plant cell wall polysaccharides proteins and lipid degradation and oxidoreduction, highlighting the importance of BcPacC in the necrotrophic lifestyle of B. cinerea.
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Dates et versions

hal-02318964 , version 1 (17-10-2019)

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Christine Rascle, Cindy Dieryckx, Jean William Dupuy, Laetitia Muszkieta, Eytham Souibgui, et al.. The pH regulator PacC: a host-dependent virulence factor in Botrytis cinerea. Environmental Microbiology Reports, 2018, Pathogen and resistance ecology, 10 (5), pp.555-568. ⟨10.1111/1758-2229.12663⟩. ⟨hal-02318964⟩
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