Signal transduction mediated by the plant UV-B photoreceptor UVR8

First author: Tong Liang; Affiliations: CAS Center for Excellence in Molecular Plant Sciences (中科院分子植物科学卓越创新中心): Shanghai, China

Corresponding author: Hongtao Liu (刘宏涛)

Ultraviolet‐B (UV‐B) light is an intrinsic part of sunlight that has significant effects on plant development and acclimation responses. UVR8 (UV Resistance Locus 8) is the long sought‐after (追寻) UV‐B photoreceptor that mediates UV‐B light perception and signal transduction. UV‐B irradiation induces the monomerization (单核化) and nuclear accumulation of UVR8 in plant cells to activate the UV‐B signaling pathway. The photoactivated UVR8 could transduce UV‐B signal via multiple mechanisms to regulate transcription and plant growth. Here, we summarize current understanding of UVR8‐mediated UV‐B signal transduction pathways, including UVR8-COP1 (CONSTITUTIVELY PHOTOMORPHOGENIC 1) and UVR8-WRKY36 (WRKY DNA‐BINDING PROTEIN 36), UVR8-BES1 (BRI1‐EMS‐SUPPRESSOR1) and BIM1 (BES1‐INTERACTING MYC‐LIKE 1).

紫外辐射（UV‐B）是自然太阳光的固有组成部分，对于植物的发育和环境适应具有非常重要的影响。植物紫外抗性位点UVR8是紫外辐射的光受体，介导UV‐B的感知和信号转导。UV‐B辐射诱导了植物细胞中的单核化和核积累以激活UV‐B信号通路。光活化的UVR8可通过多个机制转导UV‐B信号来调控转录和植物生长。本文作者总结了现有对UVR8介导的UV‐B信号转导通路的研究进展，包括UVR8-COP1、UVR8-WRKY36、UVR8-BES1及BIM1。

通讯：刘宏涛（http://sourcedb.sibs.cas.cn/zw/rck/201206/t20120620_3602838.html）

doi: 10.1111/nph.15469

Journal: New Phytologist

First Published: 13 October, 2018

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