RAC/ROP signaling regulates embryo patterning and the maintenance of the root stem cell niche in Arabidopsis
作者单位：Department of Biochemistry and Molecular BiologyUniversity of MassachusettsAmherstMA 01003USA
会议名称：《2011全国植物生物学研讨会》
会议日期：2011年
学科分类：09[农学] 0903[农学-农业资源与环境]
基 金：supported by grants from the Ministry of Science and Technology of China(2007CB948200) the National Natural Science Foundation of China(90817005 and 30770215)
关 键 词：ROP/RAC GTPases Stem cell niche Root development embryo patterning
摘 要：The root stem cell niche defines the region that specifies and maintains the stem cells and is essential for the maintenance of root *** this study,we describe the functional role of RopGEF7,a QC-expressed RAC/ROP GTPase activator,in root stem cell niche *** of RopGEF7 by RNA interference induced defects in embryo patterning,QC maintenance and root *** expression data indicate that RopGEF7 is required for the root meristem maintenance by controlling the expression of Plethora(PLT) transcription factors,which are key stem cell determinants that mediate the patterning of the root stem cell *** analyses show that RopGEF7 acts in the PLT pathway and in parallel with SHR and SCR in control of the QC ***,auxin stimulates RopGEF7 transcription