Cell morphogenesis of trichomes in Arabidopsis: differential control of primary and secondary branching by branch initiation regulators and cell growth.
Cell morphogenesis of trichomes in Arabidopsis: differential control of primary and secondary branching by branch initiation regulators and cell growth.
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发表时间：
1997-10
期刊：
影响因子：
4.6
通讯作者：
U. Folkers;J. Berger;M. Hülskamp
中科院分区：
文献类型：
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作者：
U. Folkers;J. Berger;M. Hülskamp
细胞形态发生，即获得特定的细胞形状，可以在拟南芥叶片上区分于单个表皮细胞的三分枝毛状体中进行遗传学检查。在正常发育过程中，生长中的毛细胞经历两个连续的分支事件，产生近侧茎和远端主茎，后者随后分裂成两个分支。利用新的和先前描述的毛状体突变体，我们分析了单突变体和双突变体的分支模式对分支数量或细胞大小的影响，以确定潜在的机制。我们的研究结果表明，初级分支在遗传上不同于随后的分支事件，后者，次级事件是响应分支的正调控和负调控而启动的，并受到细胞生长的控制。我们提出了在正常发育过程中如何调节毛细胞形态发生的模型。
Cell morphogenesis, i.e. the acquisition of a particular cell shape, can be examined genetically in the three-branched trichomes that differentiate from single epidermal cells on the leaves of Arabidopsis thaliana. In normal development, the growing trichome cell undergoes two successive branching events, resulting in a proximal side stem and a distal main stem which subsequently splits in two branches. Using new and previously described trichome mutants, we have analyzed the branching pattern in single and double mutants affecting branch number or cell size in order to determine underlying mechanisms. Our results suggest that primary branching is genetically distinct from subsequent branching events and that the latter, secondary events are initiated in response to positive and negative regulators of branching as well as subject to control by cell growth. We propose a model of how trichome cell morphogenesis is regulated during normal development.