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Updated: May 6, 2026

The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics
Published on: October 5, 2016
Salicylic acid represses VdMYB31 expression to enhance grape resistance to Colletotrichum viniferum
Jinhui Lin1, Ting Chen1, Xinming Liu1
1Fruit Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China.
Abstract:
Grape (Vitis vinifera) production globally faces significant challenges from grape ripe rot (Colletotrichum viniferum). MYB transcription factors (TFs) play a crucial role in mediating plant responses to biotic stresses. However, their involvement in grapevine responses to ripe rot remains unclarified. This study employed bioinformatics to identify MYB TF genes within the grapevine genome and assessed their expression profiles post C. viniferum infection via transcriptome analysis. Among the 121 R2R3-MYB genes identified, VdMYB31, predominantly expressed in mature fruits, was notably downregulated in responding to C. viniferum infection. Heterologous expression of VdMYB31 in tomato (Solanum lycopersicum) fruits increased susceptibility to C. acutatum by suppressing salicylic acid (SA)-related gene expression. Silencing MYB31 in grape berries conferred resistance to C. viniferum. Additionally, exogenous SA application bolstered grape resistance to C. viniferum infection. These findings underscore the involvement of R2R3-MYB TFs in defending against C. viniferum, positioning VdMYB31 as a promising target for breeding grape varieties with improved resistance to ripe rot in viticulture.
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