《植物生理学报》 2015, 51(11): 1809-1814

植物紫外光受体UVR8的研究进展

李国良, 张鸿, 许泳清, 纪荣昌, 邱思鑫, 汤浩, 邱永祥^*

福建省农业科学院作物研究所, 农业部南方薯类观测实验站, 福州350013

通信作者：邱永祥；E-mail: qyxlm@sohu.com；Tel: 0591-87572407

摘　要：

紫外光UV-B对植物的生长发育至关重要, 高强度的UV-B导致DNA损伤, 而低强度的UV-B调节植物的光形态建成。UVR8最早是在模式植物拟南芥中发现的一种特异性吸收UV-B的光受体, 自然状态下UVR8二聚体在UV-B下解聚成单体与COP1结合, 调控下游基因的转录表达。本文主要从蛋白结构、分子进化、生理功能及光信号转导等方面介绍UVR8的最新研究进展。

关键词：光受体; UVR8; 蛋白结构; 信号转导

收稿：2015-07-22   修定：2015-09-25

资助：现代农业产业技术体系(CARS-11-B-13)、福建省财政专项——福建省农业科学院科技创新团队项目(CXTD-1-1301)、福建省农科院青年开放基金(2015QN-3)。

Research Progress in Plant Photoreceptor UVR8

LI Guo-Liang, ZHANG Hong, XU Yong-Qing, JI Rong-Chang, QIU Si-Xin, TANG Hao, QIU Yong-Xiang^*

Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture, Fuzhou 350013, China

Corresponding author: QIU Yong-Xiang; E-mail: qyxlm@sohu.com; Tel: 0591-87572407

Abstract:

Ultraviolet (UV-B) plays an important role in plant growth. High doses of UV-B can cause DNA damage, while low doses of UV-B regulate plant photomorphogenesis. UVR8 was firstly found in the model plant Arabidopsis thaliana, and was subsequently shown to act as a UV-B photoreceptor. UVR8 can be depolymerized to monomer which interacts with COP1 in response to UV-B, and then influences the transcriptional regulation of downstream genes. This review focuses on recent understandings of the structure, molecular evolution, physiological function and signal transduction of UVR8.

Key words: photoreceptor; UVR8; protein structure; signal transduction