The identification and characterization of a plant height and grain length related gene hfr131 in rice

文献类型： 外文期刊

第一作者： Lan, Dengyong

作者： Lan, Dengyong;Liu, Mingyu;Ma, Fuying;Yan, Peiwen;Zhang, Xinwei;Hu, Jian;Niu, Fuan;He, Shicong;Cui, Jinhao;Yuan, Xinyu;Yang, Jinshui;Wang, Ying;Luo, Xiaojin;Lan, Dengyong;Liu, Mingyu;Ma, Fuying;Yan, Peiwen;Zhang, Xinwei;Hu, Jian;Niu, Fuan;He, Shicong;Cui, Jinhao;Yuan, Xinyu;Yang, Jinshui;Wang, Ying;Luo, Xiaojin;Lan, Dengyong;Wang, Ying;Cao, Liming;Niu, Fuan;Luo, Xiaojin

作者机构：

关键词： plant height; grain length; brassinosteroid; auxin; OsARF17; OsBRI1; rice

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： Plant height and grain size are important agronomic traits affecting rice yield. Various plant hormones participate in the regulation of plant height and grain size in rice. However, how these hormones cooperate to regulate plant height and grain size is poorly understood. In this study, we identified a brassinosteroid-related gene, hfr131, from an introgression line constructed using Oryza longistaminata, that caused brassinosteroid insensitivity and reduced plant height and grain length in rice. Further study showed that hfr131 is a new allele of OsBRI1 with a single-nucleotide polymorphism (G to A) in the coding region, leading to a T988I conversion at a conserved site of the kinase domain. By combining yeast one-hybrid assays, chromatin immunoprecipitation-quantitative PCR and gene expression quantification, we demonstrated that OsARF17, an auxin response factor, could bind to the promoter region of HFR131 and positively regulated HFR131 expression, thereby regulating the plant height and grain length, and influencing brassinosteroid sensitivity. Haplotype analysis showed that the consociation of OsAFR17(Hap1)/HFR131(Hap6) conferred an increase in grain length. Overall, this study identified hfr131 as a new allele of OsBRI1 that regulates plant height and grain length in rice, revealed that brassinosteroid and auxin might coordinate through OsARF17-HFR131 interaction, and provided a potential breeding target for improvement of rice yield.

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