Kinase activity of OsBRI1 is essential for brassinosteroids to regulate rice growth and development
文献类型： 外文期刊
第一作者： Zhao, Jinfeng
作者： Zhao, Jinfeng;Li, Xueyong;Wu, Chenxi;Zhao, Baohua;Yuan, Shoujiang;Yin, Liang;Sun, Wei;Zhao, Qinglei
作者机构：
关键词： BRASSINOSTEROID INSENSITIVE 1 (BRI1);DWARF 61 (D61);dwarf54 (d54);Kinase activity
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： 2013 年 199 卷
页码：
收录情况： SCI
摘要： Brassinosteroids (BRs) are steroid hormones that participate in multiple biological processes. In this paper, we characterized a classic rice mutant Fn189 (dwarf54, d54) showing semi-dwarf stature and erect leaves. The coleoptile elongation and root growth was less affected in Fn189 than wild-type plant by the exogenous application of eBL, the most active form of BRs. Lamina joint inclination assay and morphological analysis in darkness further showed that Fn189 mutant plant was insensitive to exogenous eBL. Through map-based cloning, Fn189 was found to be a novel allelic mutant of the DWARF61 (D61) gene, which encodes the putative BRs receptor OsBRI1. A single base mutation caused the I834F substitution in the OsBRI1 kinase domain. Consequently, kinase activity of OsBRI1 was found to decrease dramatically. Taken together, the kinase activity of OsBRI1 is essential for brassinosteroids to regulate normal plant growth and development in rice. (c) 2012 Elsevier Ireland Ltd. All rights reserved.
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