Overexpression of a B-type cytokinin response regulator (OsORR2) reduces plant height in rice

文献类型： 外文期刊

第一作者： Shi, Fachao

作者： Shi, Fachao;An, Yuxing;Wang, Min

作者机构：

关键词： Overexpression; cytokinin; OsORR2; plant height; rice

期刊名称：PLANT SIGNALING & BEHAVIOR （ 影响因子：2.247； 五年影响因子：2.369 ）

ISSN： 1559-2316

年卷期： 2020 年 15 卷 8 期

页码：

收录情况： SCI

摘要： Cytokinin plays crucial roles in regulating plant growth and development, with the signal transduction mediated by type-A and type-B response regulators (RRs).While much genetic knowledge about RRs on regulating plant height remains unclear. Here, we found that overexpressing anOsORR2gene (a type-B RR) could reduce plant height in rice compared with the wild type (WT). Using quantitative real time (RT-qPCR) assay,OsORR2was expressed widely in most tissues such as root, culm, sheath, leaf, and panicle. Strong signals were detected in leaf mesophyll cells and anther by in situ hybridization assays (ISH). The subcellular localization of OsORR2 was in cell nucleus. In addition, we found that the transcriptional expression levels of type-A RR genes such asOsRR9, OsRR10, OsRR12, andOsRR13were significantly up-regulated in the overexpression transgenic plants (OE) plants. Taken together, our data suggested thatOsORR2was involved in the development of plant height in rice and provided a foundation for future deep molecular research of the type-B RRs.

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