J Integr Plant Biol ›› 2025, Vol. 67 ›› Issue (4): 993-1008.DOI: 10.1111/jipb.13895

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  • 收稿日期:2024-11-22 接受日期:2025-02-23 出版日期:2025-04-01 发布日期:2025-04-28

VvHY5 and VvBEE1 antagonistically control resveratrol biosynthesis to mitigate high light-induced damage in grapevine

Zain Ali, Yanzhao Sun, Zhaodong Ma, Yanyan Zheng, Yang Liu*   

  1. College of Horticulture, China Agricultural University, Beijing 100193, China
  • Received:2024-11-22 Accepted:2025-02-23 Online:2025-04-01 Published:2025-04-28
  • Contact: *Yang Liu (liuyang_yuanyi@cau.edu.cn)
  • Supported by:
    National Natural Science Foundation of China (32472664), the Chinese Universities Scientific Fund (15053348, 15054003) and the 2115 Talent Development Program of China Agricultural University.

Abstract: Excessive exposure to high light can lead to photoinhibition, which impairs photosynthetic efficiency and causes oxidative damage in plants, such as sunburn in grapevines. This study investigates the role of resveratrol (Res), a stilbenoid with antioxidant properties, in protecting plants from high light damage. We found that exposure to high light increased reactive oxygen species (ROS) accumulation and induced photoinhibition in grapevine leaves. In response, Res biosynthesis was upregulated, along with an increase in stilbene synthase (VvSTS) expression. Application of exogenous Res alleviated ROS accumulation and improved photosynthetic efficiency. Further analysis revealed that the VvHY5-VvBEE1 regulatory module plays a pivotal role in regulating VvSTS expression under high light conditions. Specifically, VvHY5 activated VvSTS expression, while VvBEE1 repressed it. Transgenic analysis showed that overexpression of VvHY5 enhanced Res production and photoprotection, whereas overexpression of VvBEE1 reduced Res levels and exacerbated light-induced damage. VvHY5 and VvBEE1 competed for binding to the VvSTS promoter, with brassinosteroids (BRs) modulating their interaction. Our findings reveal the interplay between light signaling and brassinosteroid pathways in regulating Res biosynthesis, providing insights for protecting grapevines from sunburn.

Key words: grapevine, high light, resveratrol, VvBEE1, VvHY5

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