Clock component OsPRR59 delays heading date by repressing transcription of Ehd3 in rice

文献类型： 外文期刊

第一作者： Wang, Yupeng

作者： Wang, Yupeng;Wu, Fuqing;Chen, Weiwei;Cheng, Zhijun;Zhang, Xin;Lin, Qibing;Ren, Yulong;Lei, Cailin;Guo, Xiuping;Zhu, Shanshan;Wan, Jianmin;Zhou, Shirong;Duan, Erchao;Wang, Jiachang;Wan, Jianmin;Li, Chenyan;Wu, Ziming

作者机构：

关键词： Circadian clock; Ehd3; Heading date; Oryza sativa; Pseudo -response regulator

期刊名称：CROP JOURNAL （ 影响因子：4.647； 五年影响因子：5.781 ）

ISSN： 2095-5421

年卷期： 2022 年 10 卷 6 期

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收录情况： SCI

摘要： Heading date (or flowering time), an important agronomic trait in crop species, is closely associated with regional adaptation and yield. Members of the Pseudo-Response Regulator (PRR) family play key roles in regulating flowering. However, their role and molecular mechanism controlling heading date in rice is not very clear. Here, we identified rice OsPRR protein, OsPRR59, which delayed heading under long-day conditions. OsPRR59 positively regulates yield by affecting plant height, secondary branches number per panicle, grain number per panicle, seed setting rate, and grain weight per plant. OsPRR59 is expressed in most tissues and its protein is localized to the nucleus. We also found that OsPRR59 directly binds to the promoter of Ehd3 to inhibit its expression. Compared with the WT, osprr59 ehd3 showed a signifi-cantly delayed heading phenotype, as did the ehd3 mutant. This was opposite to the phenotype of the osprr59 mutant, confirming that Ehd3 acted downstream of OsPRR59 in regulating rice flowering. Our results identified a direct regulator of Ehd3, and revealed a novel molecular mechanism of clock compo-nent OsPRR proteins in regulating heading date and provide a new genetic resource for fine-tuning head-ing date in rice. (c) 2022 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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