The OsFTIP6-OsHB22-OsMYBR57 module regulates drought response in rice
作者机构：State Key Laboratory of Rice BiologyZhejiang Provincial Key Laboratory of Crop Genetic ResourcesInstitute of Crop ScienceCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310058China State Key Laboratory of Rice BiologyChina National Rice Research InstituteHangzhou 311400China College of HorticultureFAFU-UCR Joint Center for Horticultural Biology and MetabolomicsHaixia Institute of Science and TechnologyFujian Agriculture and Forestry UniversityFuzhou 350002China Department of Biological Sciences and Temasek Life Sciences LaboratoryNational University of SingaporeSingapore 117543Singapore
出 版 物：《Molecular Plant》 (分子植物（英文版）)
年 卷 期：2022年第15卷第7期
页 面：1227-1242页
核心收录：
学科分类：0710[理学-生物学] 09[农学] 0901[农学-作物学]
基 金：Foundation of China(LR21C130001) Leading Innovative and EntrepreneurTeam Introduction Program of Zhejiang(2019R01002) Key Research and Development Program of Zhejiang(2020C02002) Zhejiang Provincial Special Key project of New Rice Variety Breeding(2021C02063-1) the Singapore National Research Foundation lnvestigatorship Programme(NRF-NRFl2016-02) Hundred-Talent Program of Zhejiang University.
主 题：OsMYBR57 OsHB22 OsFTIP6 drought response nucleocytoplasmic trafficking rice
摘 要：Plants have evolved a sophisticated set of mechanisms to adapt to drought stress.Transcription factors play crucial roles in plant responses to various environmental stimuli by modulating the expression of numerous stress-responsive genes.However,how the crosstalk between different transcription factor families orchestrates initiation of the key transcriptional network and the role of posttranscriptional modification of transcription factors,especially in cellular localization/trafficking in response to stress in rice,remain still largely unknown.In this study,we isolated an Osmybr57 mutant that displays a drought-sensitive phenotype through a genetic screen for drought stress sensitivity.We found that OsMYBR57,an MYB-related protein,directly regulates the expression of several key drought-related OsbZ/Ps in response to drought treatment.Further studies revealed that OsMYBR57 interacts with a homeodomain transcription factor,OsHB22,which also plays a positive role in drought signaling.We further demonstrate that OsFTIP6 interacts with OsHB22 and promotes the nucleocytoplasmic translocation of OsHB22 into the nucleus,where OsHB22 cooperates with OsMYBR57 to regulate the expression of drought-responsive genes.Our findings have revealed a mechanistic framework underlying the OsFTIP6-0sHB22-0sMYBR57 module-mediated regulation of drought response in rice.The OsFTIP6-mediated OsHB22 nucleocytoplasmic shuttling and OsMYBR57-0sHB22 regulation of OsbZIP transcription ensure precise control of expression of OsLEA3 and Rab21,and thereby regulate the response to water deficiency in rice.
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