PME10 Is a Pectin Methylesterase Driving PME Activity and Immunity Against Botrytis cinerea in Grapevine (Vitis vinifera L.).

ABSTRACT: Botrytis cinerea (Bc) is a major pathogen of cultivated grapevine (Vitis vinifera L.), with cell wall (CW) remodelling playing a critical role in fungal colonisation. CW-modifying enzymes, particularly pectin methylesterases (PMEs), produced by both host and pathogen, influence CW integrity and the outcome of infection. To explore the role of CW composition and remodelling in grapevine's response to Bc, we inoculated three genotypes with varying susceptibility at full flowering. Biochemical analysis of flowers and ripe berry skins revealed that the tolerant genotype exhibited significantly higher PME activity postinfection compared with the susceptible ones. Unbiased transcriptome analysis of infected flower tissues showed a more intense transcriptional response in the susceptible genotype

SUBMITTER: Lagreze J 

PROVIDER: S-EPMC12576464 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature