white panicle2 encoding thioredoxin z, regulates plastid RNA editing by interacting with multiple organellar RNA editing factors in rice

文献类型： 外文期刊

第一作者： Wang, Yunlong

作者： Wang, Yunlong;Wang, Yihua;Duan, Erchao;Zhu, Xiaopin;Hao, Yuanyuan;Zhu, Jianping;Chen, Rongbo;Lei, Jie;Teng, Xuan;Zhang, Yuanyan;Wang, Di;Jiang, Ling;Liu, Shijia;Tian, Yunlu;Liu, Xi;Chen, Liangming;Wan, Jianmin;Ren, Yulong;Zhang, Xin;Guo, Xiuping;Wang, Haiyang;Wan, Jianmin

作者机构：

关键词： MORFs; Oryza sativa; regulation; RNA editing; TRX; WP2

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.151； 五年影响因子：10.475 ）

ISSN： 0028-646X

年卷期： 2021 年 229 卷 5 期

页码：

收录情况： SCI

摘要： Thioredoxins (TRXs) occur in plant chloroplasts as complex disulphide oxidoreductases. Although many biological processes are regulated by thioredoxins, the regulatory mechanism of chloroplast TRXs are largely unknown. Here we report a rice white panicle2 mutant caused by a mutation in the thioredoxin z gene, an orthologue of AtTRX z in Arabidopsis. white panicle2 (wp2) seedlings exhibited a high-temperature-sensitive albinic phenotype. We found that plastid multiple organellar RNA editing factors (MORFs) were the regulatory targets of thioredoxin z. We showed that OsTRX z protein physically interacts with OsMORFs in a redox-dependent manner and that the redox state of a conserved cysteine in the MORF box is essential for MORF-MORF interactions. wp2 and OsTRX z knockout lines show reduced editing efficiencies in many plastidial-encoded genes especially under high-temperature conditions. An Arabidopsis trx z mutant also exhibited significantly reduced chloroplast RNA editing. Our combined results suggest that thioredoxin z regulates chloroplast RNA editing in plants by controlling the redox state of MORFs.

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