ROP GTPase-mediated auxin signaling regulates pavement cell interdigitation in Arabidopsis thaliana

作     者：Deshu Lin Huibo Ren Ying Fu 

作者机构：Center for Genomics and Biotechnology Fujian Agriculture and Forestry University State Key Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University 

出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)

年 卷 期：2015年第57卷第1期

页      面：31-39页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 071009[理学-细胞生物学] 

基　　金：supported by startup funds to D. L. from Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University supported by Natural Science Foundation of China (31361140354) 

主　　题：Auxin leaf pavement cell Rho of plants GTPase 

摘      要：In multicellular plant organs, cell shape formation depends on molecular switches to transduce developmental or environmental signals and to coordinate cell-to-cell communi- cation. Plants have a specific subfamily of the Rho GTPase family, usually called Rho of Plants （ROP）, which serve as a critical signal transducer involved in many cellular processes. In the last decade, important advances in the ROP-mediated regulation of plant cell morphogenesis have been made by using Arubidopsis thaliana leaf and cotyledon pavement cells. Especially, the auxin-ROP signaling networks have been demonstrated to control interdigitated growth of pavement ceils to form jigsaw-puzzle shapes. Here, we review findingsrelated to the discovery of this novel auxin-signaling mecha- nism at the cell surface. This signaling pathway is to a large extent independent of the well-known Transport Inhibitor Response （TIR）-Auxin Signaling F-Box （AFB） pathway, and instead requires Auxin Binding Protein 1 （ABP1） interaction with the plasma membrane-localized, transmembrane kinase （TMK） receptor-like kinase to regulate ROP proteins. Once activated, ROP influences cytoskeletal organization and inhibits endocytosis of the auxin transporter PINt. The present review focuses on ROP signaling and its self-organizing feature allowing ROP proteins to serve as a bustling signal decoder and integrator for plant cell morphogenesis.