Coordinated Transcriptional Regulation by the UVB Photoreceptor and Multiple Transcription Factors for Plant UV-B Responses

作     者：Chongzhen Qian Zhiren Chen Qing Liu Weiwei Mao Yanling Chen Wei Tian Yan Liu Jiupan Han Xinhao Ouyang Xi Huang Chongzhen Qian;Zhiren Chen;Qing Liu;Weiwei Mao;Yanling Chen;Wei Tian;Yan Liu;Jiupan Han;Xinhao Ouyang;Xi Huang

作者机构：State Key Laboratory of Cellular Stress BiologySchool of Life SciencesXiamen UniversityXiamen 361102China 

出 版 物：《Molecular Plant》 (分子植物（英文版）)

年 卷 期：2020年第13卷第5期

页      面：777-792页

核心收录：

学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学] 

基　　金：grants from the National Key R&D Program of China(2017YFA0506100 and 2016YFA0502900) the National Natural Science Foundation of China(31771347 and 31671378) the National Natural Science Foundation of Fujian(2018J06009) the Fundamental Transcriptional Regulation by UVR8 and TFs Research Funds for the Central Universities(20720190085 and 20720170068) 

主　　题：UV-B UVR8 MYB13 transcription factor transcriptional regulation 

摘      要：Non-damaging ultraviolet B(UV-B)light promotes photomorphogenic development and stress acclimation through UV-B-specific signal transduction in ***-B irradiation induces monomerization and nuclear translocation of the UV-B photoreceptor UV RESISTANCE LOCUS 8(UVR8).However,it is not clear how the nuclear localization of UVR8 leads to changes in global gene ***,we reveal that nuclear UVR8 governs UV-B-responsive transcriptional networks in concert with several previously known transcription factors,including ELONGATED HYPOCOTYL 5(HY5)and PHYTOCHROME INTERACTING FACTOR 4(PIF4).Based on the transcriptomic analysis,we identify MYB13 as a novel positive regulator in UV-B-induced cotyledon expansion and stress ***13 is UV-B inducible and is predominantly expressed in the *** results demonstrate that MYB13 protein functions as a transcription factor to regulate the expression of genes involved in auxin response and flavonoid biosynthesis through direct binding with their *** addition,photoactivated UVR8 interacts with MYB13 in a UV-B-dependent manner and differentially modulates the affinity of MYB13 with its *** together,our results elucidate the cooperative function of the UV-B photoreceptor UVR8 with various transcription factors in the nucleus to orchestrate the expression of specific sets of downstream genes and,ultimately,mediate plant responses to UV-B light.