OsPRR37 Alternatively Promotes Heading Date Through Suppressing the Expression of Ghd7 in the Japonica Variety Zhonghua 11 under Natural Long-Day Conditions
文献类型： 外文期刊
第一作者： Hu, Yong
作者： Hu, Yong;You, Aiqing;Hu, Yong;Zhou, Xin;Zhang, Bo;Li, Shuangle;Fan, Xiaowei;Zhao, Hu;Zhang, Jia;He, Qin;Li, Qiuping;Ayaad, Mohammed;Xing, Yongzhong;Hu, Yong;Zhou, Xin;Zhang, Bo;Li, Shuangle;Fan, Xiaowei;Zhao, Hu;Zhang, Jia;He, Qin;Li, Qiuping;Ayaad, Mohammed;Xing, Yongzhong;Liu, Haiyang;Ayaad, Mohammed
作者机构：
关键词： Rice; Heading date; Alternative function; MutMap; Regulatory pathway
期刊名称：RICE （ 影响因子：4.783； 五年影响因子：5.23 ）
ISSN： 1939-8425
年卷期： 2021 年 14 卷 1 期
页码：
收录情况： SCI
摘要： Heading date is an important agronomic trait of rice (Oryza sativa L.) and is regulated by numerous genes, some of which exhibit functional divergence in a genetic background-dependent manner. Here, we identified a late heading date 7 (lhd7) mutant that flowered later than wild-type Zhonghua 11 (ZH11) under natural long-day (NLD) conditions. Map-based cloning facilitated by the MutMap strategy revealed that LHD7 was on the same locus as OsPRR37 but exhibited a novel function as a promoter of heading date. A single-nucleotide mutation of G-to-A in the coding region caused a substitution of aspartic acid for glycine at site 159 within the pseudo-receiver (PR) domain of OsPRR37. Transcriptional analysis revealed that OsPRR37 suppressed Ghd7 expression in both ZH11 background under NLD conditions and the Zhenshan 97 background under natural short-day conditions. Consistently, the expression of Ehd1, Hd3a and RFT1 was enhanced by OsPRR37 in the ZH11 background. Genetic analysis indicated that the promotion of heading date and reduction in grain yield by OsPRR37 were partially dependent on Ghd7. Further investigation showed that the alternative function of OsPRR37 required an intact Ghd7-related regulatory pathway involving not only its upstream regulators OsGI and PhyB but also its interacting partner Hd1. Our study revealed the distinct role of OsPRR37 in the ZH11 background, which provides a more comprehensive understanding of OsPRR37 function and enriches the theoretical bases for improvement of rice heading date in the future.
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