《植物生理学报》 2021, 57(6): 1179-1188

植物紫外光B受体UVR8的信号转导途径

陈慧泽^1,2,*，牛靖蓉¹，韩榕^1,2,*

¹山西师范大学生命科学学院, 山西临汾041000；²山西师范大学植物分子与环境胁迫响应山西省高校重点实验室, 山西临汾041000

通信作者：陈慧泽；E-mail: chenhz@sxnu.edu.cn；韩榕；E-mail: hanrong@sxnu.edu.cn

摘　要：

紫外光B (UV-B)是太阳光的固有组成部分, 对植物生长发育和环境适应有重要影响。UVR8是目前 唯一确定的介导UV-B感知和信号转导的UV-B受体。UV-B诱导植物细胞质中UVR8发生单体化和核积聚,  通过影响下游转录因子活性激活UV-B信号通路, 调控植物生长发育及环境适应。本文全面介绍了UVR8 被确定为UV-B受体以来, 人们对UVR8蛋白结构、信号转导和生理功能等方面的最新研究进展, 并对这 一领域的研究问题进行了讨论及展望。

关键词：紫外辐射; 光受体; 信号转导; 植物响应

资助：国家自然科学基金(31900251)

Signal transduction pathways of plant ultraviolet B receptor UVR8

CHEN Huize^1,2,*, NIU Jingrong¹, HAN Rong^1,2,*

¹School of Life Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China; ²Higher Education Key Laboratory of Plant Molecular and Environmental Stress Response (Shanxi Normal University) in Shanxi Province, Linfen, Shanxi 041000, China

Corresponding author: CHEN Huize; E-mail: chenhz@sxnu.edu.cn; HAN Rong; E-mail: hanrong@sxnu.edu.cn

Abstract:

Ultraviolet B (UV-B) is an intrinsic component of sunlight and has important effects on plant  growth, development, and environmental adaptation. UVR8 is the only identified UV-B receptor that mediates UV-B perception and signal transduction. UV-B radiation induces monomerization and nuclear  accumulation of UVR8 in the plant cytoplasm, which activates the UV-B signaling pathway by affecting  the downstream transcription factors, thereby regulates plant growth and environmental adaptation.  Here, we review the latest research progress on the structure, signal transduction and physiological functions of UVR8 protein since UVR8 was identified as a UV-B photoreceptor and provide an outlook on the  research in this field.

Key words: ultraviolet radiation; light receptor; signaling; plant response