文献类型： 外文期刊
作者： Rong, Fuxi 1 ; Lv, Yusong 1 ; Deng, Pingchuan 1 ; Wu, Xia 1 ; Zhang, Yaqi 3 ; Yue, Erkui 1 ; Shen, Yuxin 1 ; Muhammad, Sajid 1 ; Ni, Fangrui 1 ; Bian, Hongwu 5 ; Wei, Xiangjin 6 ; Zhou, Weijun 1 ; Hu, Peisong 6 ; Wu, Liang 1 ;
作者机构： 1.Zhejiang Univ, Coll Agr & Biotechnol, Key Lab Crop Germplasm Resources Zhejiang Prov, Hangzhou 310058, Zhejiang, Peoples R China
2.Zhejiang Univ, Coll Agr & Biotechnol, Zhejiang Prov Key Lab Crop Germplasm Resources, Hangzhou 310058, Zhejiang, Peoples R China
3.Zhejiang Univ, Hainan Inst, Hainan Yazhou Bay Seed Lab, Sanya 572000, Hainan, Peoples R China
4.Northwest A&F Univ, Coll Agron, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China
5.Zhejiang Univ, Inst Genet & Regenerat Biol, Coll Life Sci, Key Lab Cell & Gene Engn Zhejiang Prov, Hangzhou 310058, Peoples R China
6.China Natl Rice Res Inst, China Natl Ctr Rice Improvement, Natl Key Lab Rice Biol, Hangzhou 310006, Zhejiang, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：16.6； 五年影响因子：17.0 ）
ISSN：
年卷期： 2024 年 15 卷 1 期
页码：
收录情况： SCI
摘要： MicroRNAs (miRNAs) play fundamental roles in many developmental and physiological processes in eukaryotes. MiRNAs in plants generally regulate their targets via either mRNA cleavage or translation repression; however, which approach plays a major role and whether these two function modes can shift remains elusive. Here, we identify a miRNA, miR408-5p that regulates AUXIN/INDOLE ACETIC ACID 30 (IAA30), a critical repressor in the auxin pathway via switching action modes in rice. We find that miR408-5p usually inhibits IAA30 protein translation, but in a high auxin environment, it promotes the decay of IAA30 mRNA when it is overproduced. We further demonstrate that IDEAL PLANT ARCHITECTURE1 (IPA1), an SPL transcription factor regulated by miR156, mediates leaf inclination through association with miR408-5p precursor promoter. We finally show that the miR156-IPA1-miR408-5p-IAA30 module could be controlled by miR393, which silences auxin receptors. Together, our results define an alternative auxin transduction signaling pathway in rice that involves the switching of function modes by miR408-5p, which contributes to a better understanding of the action machinery as well as the cooperative network of miRNAs in plants. miR408-5p typically regulates target IAA30 via translation repression, but switches to cleaving IAA30 mRNA under high auxin conditions. miR393, miR156, miR408-5p and their targets could hierarchically act in auxin pathway and regulate leaf inclination.
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