转录因子在植物响应UV-B辐射中的调控作用

doi:10.11983/CBB24165

摘要/Abstract

摘要： 作为太阳光的固有成分, UV-B在植物生长发育方面有重要影响。随着对UV-B研究的深入, 人们认识到UV-B不仅是环境胁迫影响因子, 还是植物生长过程中一个重要的信号分子, 适度的UV-B辐射对植物生长具有促进作用。UVR8是UV-B特有的光感受器, 在植物响应UV-B过程中发挥不可替代的作用, 且其发挥作用还需依赖转录因子。差异表达基因是多细胞真核生物发育过程中的关键要素, 转录因子可调节靶基因表达, 因此编码转录因子的基因通常是真核生物发育的主要调控基因。目前, 已知BBX、WRKY、MYB和PIF等多种转录因子参与调控UV-B辐射下的下胚轴伸长、主根长度、叶片大小及形态、开花周期和花青素合成等过程。该文主要综述了UVR8在UV-B信号通路中的分子机制, 并对转录因子在UV-B辐射过程中的调控机理进行总结, 以期为相关研究提供参考。

关键词: UVR8, 转录因子, UV-B辐射, 植物

Abstract: UV-B, as an inherent constituent of sunlight, exerts a crucial influence on the growth and development of plants. With the deepening of researches, it is recognized that UV-B is not merely an environmental stressor, but also a significant signal molecule in the plant growth process, and moderate UV-B radiation has a certain promoting effect on plant growth. UVR8, as a unique photoreceptor specific to UV-B, plays an irreplaceable role in the plant’s response to UV-B, and the exertion of its specific functions still depends on transcription factors. Differentially expressed gene is a key element in the developmental process of multicellular eukaryotes, and transcription factors can regulate gene expression, thus transcription factors are typically the main regulatory genes for the development of such organisms. At present, a variety of transcription factors such as BBXs, WRKYs, MYBs, and PIFs have been reported to be involved in regulating processes like hypocotyl elongation, primary root length, leaf size and shape, flowering cycle, and anthocyanin synthesis under UV-B conditions. This article mainly reviews the molecular mechanisms of UVR8 in the UV-B signaling pathway and summarizes the regulatory mechanisms of transcription factors during the UV-B radiation process, and to provide reference for relevant research.

Key words: UVR8, transcription factor, UV-B radiation, plant

陈鹏翔, 王波, 王子俊, 韩榕. 转录因子在植物响应UV-B辐射中的调控作用. 植物学报, 2025, 60(3): 1-0.

Pengxiang Chen, Bo Wang, Zijun Wang, Rong Han. The Regulation of Transcription Factor in Plant Response UV-B Radiation. Chinese Bulletin of Botany, 2025, 60(3): 1-0.

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