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Salicylic acid represses VdMYB31 expression to enhance grape resistance to Colletotrichum viniferum

文献类型： 外文期刊

作者： Lin, Jinhui 1 ; Chen, Ting 1 ; Liu, Xinming 1 ; Chen, Zhen 1 ; Lei, Yan 1 ;

作者机构： 1.Fujian Acad Agr Sci, Fruit Res Inst, Fuzhou 350013, Peoples R China

关键词： Vitis davidii; VdMYB31; Colletotrichum; Salicylic acid

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.5； 五年影响因子：8.7 ）

ISSN： 0141-8130

年卷期： 2025 年 288 卷

页码：

收录情况： SCI

摘要： 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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