The Specification of Geometric Edges by a Plant Rab GTPase Is an Essential Cell-Patterning Principle During Organogenesis in Arabidopsis
作者： Charlotte Kirchhelle , Cheung-Ming Chow , Camille Foucart , Helia Neto , York-Dieter Stierhof
DOI: 10.1016/J.DEVCEL.2016.01.020
关键词:
摘要: Plant organogenesis requires control over division planes and anisotropic cell wall growth, which each require spatial patterning of cells. Polyhedral plant cells can display complex in individual faces are established as biochemically distinct domains by endomembrane trafficking. We now show that, during organogenesis, the Arabidopsis system specifies an important additional cellular domain: geometric edges. Previously unidentified membrane vesicles lying immediately beneath plasma at edges were revealed through localization RAB-A5c, a GTPase Rab family membrane-trafficking regulators. Specific inhibition RAB-A5c activity grossly perturbed geometry developing lateral organs interfering independently with growth anisotropy cytokinesis without disrupting default The initial loss normal be explained failure to maintain stiffness specifically thus meets requirement specify this domain organogenesis.
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