OsMYB84,a transcriptional regulator of OsCOPT2 and OsHMA5,modulates copper uptake and transport and yield production in rice

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外文摘要：Transcription factors regulating crop uptake and translocation of the micronutrient Cu have not been identified.We isolated a novel R2R3-MYB transcription factor,OsMYB84,and showed that it was a pos-itive regulator involved in uptake and transport of Cu via activation of OsCOPT2 and OsHMA expression.OsMYB84 was highly expressed in roots and anthers and induced by Cu.Overexpression of OsMYB84 pro-moted uptake and root-to-shoot translocation of Cu in rice,facilitated Cu distribution into grain and increased grain yield.In contrast,mutation of OsMYB84 reduced Cu concentration in xylem sap.OsMYB84 bound to the promoter region of OsCOPT2 and OsHMA5 and upregulated their expression.OsCOPT2 mutants showed reduced uptake of Cu and OsHMA5 overexpression lines showed increased root-to-shoot translocation of Cu.

外文关键词：

OsMYB84OsCOPT2OsHMA5CopperRice

作者：

Jingli Ding、Chenchen Ji、Lu Yu、Chuang Wang、Guangda Ding、Sheliang Wang、Lei Shi、Fangsen Xu、Hongmei Cai

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作者单位：

Research Center of Microelement,Huazhong Agricultural University,Wuhan 430070,Hubei,China

College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,Hubei,China

National Key Laboratory of Crop Genetics and Improvement,Huazhong Agricultural University,Wuhan 430070,Hubei,China

基金：

国家重点研发计划

项目编号：

2021YFD1901203

出版年：

2024

DOI：

10.1016/j.cj.2024.01.012

作物学报(英文版)

CSTPCD

ISSN：

年,卷(期)：2024.12(2)

参考文献量64