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The osftip6-OsHB22-OsMYBR57 module regulates drought response in rice

Molecular Plant 2022年第7期15卷 1227-1242页

作者： Lijia Yang Ying Chen Liang Xu Jiaxuan Wang Haoyue Qi Jiazhuo Guo Liang Zhang Jun Shen Huanyu Wang Fan Zhang Lijun Xie Wenjun Zhu Peitao Lü Qian Qian Hao Yu Shiyong Song State Key Laboratory of Rice Biology Zhejiang Provincial Key Laboratory of Crop Genetic ResourcesInstitute of Crop ScienceCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310058China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 311400China College of Horticulture FAFU-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 Laboratory National University of SingaporeSingapore 117543Singapore

Plants have evolved a sophisticated set of mechanisms to adapt to drought *** factors play crucial roles in plant responses to various environmental stimuli by modulating the expression of numerous stress-responsive ***,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 *** this study,we isolated an Osmybr57 mutant that displays a drought-sensitive phenotype through a genetic screen for drought stress *** found that OsMYBR57,an MYB-related protein,directly regulates the expression of several key drought-related OsbZ/Ps in response to drought *** studies revealed that OsMYBR57 interacts with a homeodomain transcription factor,OsHB22,which also plays a positive role in drought *** 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 *** findings have revealed a mechanistic framework underlying the osftip6-0sHB22-0sMYBR57 module-mediated regulation of drought response in *** 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.

关键词： OsMYBR57 OsHB22 osftip6 drought response nucleocytoplasmic trafficking rice

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