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Deciphering Grape Berry Peel Resistance to Botrytis cinerea: A Transcriptomic and Metabolomic Perspective
Hongyi Ma1, Chengnan Li1, Shan Li1
1College of Enology and Horticulture, Ningxia University, Yinchuan 750021, China.
Journal of Agricultural and Food Chemistry
|April 22, 2025
Summary
Grapevine fruit peels possess unknown defense strategies against gray mold (Botrytis cinerea). This study identified key genes and metabolites, revealing VaWRKY20 as a crucial regulator for enhanced peel immunity in Vitis amurensis.
Area of Science:
- Plant Pathology
- Genomics
- Metabolomics
Background:
- Grape fruit peel is crucial for defense against pathogens like Botrytis cinerea.
- Understanding grapevine peel immunity is essential for disease resistance.
Purpose of the Study:
- To elucidate novel resistance mechanisms in grapevine peel.
- To identify key genetic and metabolic players in Vitis amurensis defense.
Main Methods:
- Comparative transcriptomic and metabolomic analyses of Vitis amurensis (BH) and Vitis vinifera (RG).
- Weighted gene co-expression network analysis (WGCNA) to identify gene modules and hub genes.
- Transcriptomic profiling to pinpoint regulatory genes like VaWRKY20.
Main Results:
- Identified 1277 differentially expressed genes (DEGs) and 38 differentially accumulated metabolites (DAMs).
- Discovered key modules and hub genes via WGCNA, highlighting VaWRKY20 as a central regulator.
- Observed upregulation of salicylic acid, lignin, and stilbene biosynthesis pathways in BH post-infection, correlating with enhanced resistance.
Conclusions:
- Proposed a conceptual model for Vitis amurensis defense against Botrytis cinerea.
- VaWRKY20 plays a vital role in enhancing grapevine peel immunity.
- Novel insights into grapevine defense mechanisms against fungal pathogens were provided.
