OsDOG1L-3 regulates seed dormancy through the abscisic acid pathway in rice

文献类型： 外文期刊

第一作者： Wang, Qian

作者： Wang, Qian;Wu, Tao;Duan, Erchao;Huang, Yunshuai;Yang, Chunyan;Mou, Changling;Lan, Jie;Zhou, Chunlei;Xie, Kun;Liu, Xi;Jiang, Ling;Wan, Jianmin;Lin, Qibing;Zhang, Xin;Guo, Xiuping;Wang, Jie;Wan, Jianmin

作者机构：

关键词： ABA; bZIP protein; DOG1-like; Oryza sativa; Pre-harvest sprouting; Seed dormancy

期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）

ISSN： 0168-9452

年卷期： 2020 年 298 卷

页码：

收录情况： SCI

摘要： Seed dormancy is closely related to pre-harvest sprouting resistance. Both plant hormone abscisic acid (ABA) and DELAY OF GERMINATION 1 (DOG1) protein are key regulators of seed dormancy. Their relationship is well reported in Arabidopsis, but little is known in rice. Here, we show that a quantitative trait locus, qSd-1-1 contributes significantly to seed dormancy differences between the strongly dormant indica variety N22 and non-dormant japonica variety Nanjing35. It encodes a DOG1-like protein named OsDOG1L-3 with homology to Arabidopsis DOG1. There were evident promoter and expression differences in OsDOG1L-3 between N22 and Nanjing35, and overexpression or introduction of the N22 OsDOG1L-3 allele in Nanjing35 enhanced its seed dormancy. OsDOG1L-3 expression was positively correlated with seed dormancy and induced by ABA. OsbZIP75 and OsbZIP78 bound directly with the promoter of OsDOG1L-3 to induce its expression. Overexpression of OsbZIP75 increased OsDOG1L-3 protein abundance and promoted seed dormancy. OsDOG1L-3 upregulated expression of ABA-related genes and increased ABA content. We propose that the N22 OsDOG1L-3 allele is a candidate gene for the seed dormancy in QTL qSd-1-1, and that it participates in the ABA pathway to establish seed dormancy in rice.

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