Plant Stature Related receptor-like Kinanse2 (PSRK2) acts as a factor that determines stem elongation toward gibberellins response in rice
文献类型： 外文期刊
作者： Li, Yixing 1 ; Tang, Dongying 1 ; Li, Li 2 ; Zhao, Xiaoying 1 ; Lin, Jianzhong 1 ; Liu, Xuanming 1 ;
作者机构： 1.Hunan Univ, Coll Biol, Hunan Prov Key Lab Plant Funct Genom & Dev Regula, Changsha, Hunan, Peoples R China
2.Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha, Hunan, Peoples R China
关键词： Rice (Oryza sativa); stem; plant height; GA signaling; PSRK2
期刊名称：BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY （ 影响因子：2.043； 五年影响因子：2.017 ）
ISSN： 0916-8451
年卷期： 2018 年 82 卷 11 期
页码：
收录情况： SCI
摘要： Gibberellins (GAs) are a family of plant hormones that are important to multiple aspects of plant growth and development, especially stem elongation. A PSRK2 was obtained through screening and identifying RLK dominant negative mutants. Phenotype of the loss-of-function mutants, psrk2-DN and psrk2-RNAi, showed that PSRK2 could influence the length of the uppermost and fourth internodes, indicating that PSRK2 might regulate cell division in the intercalary meristems and/or cell elongation in the internodes. Moreover, the expression pattern showed that PSRK2 was strongly expressed in the joined-nodes after the start-up of reproductive growth, but undetectable in leaves. PSRK2 expression was also found to be induced by GA(3), and PSRK2 was involved in GA signaling in cereal aleurone cells, and PSRK2 influence the relative length of the second leaf sheaths in seedling stage. These results indicate PSRK2 is a component of GA signaling pathway that controls stem elongation by negatively regulating GA responses.
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