Molecular and Genetic Analysis of Root Cell Shape Regulationin Arabidopsis thaliana

植物根的形态是由组成根的单个细胞的数量和形状决定的。 根细胞的形状反过来又是环境因素影响基本遗传程序的结果。 参与根细胞形状决定的基因座已被确定为在简单植物拟南芥中鉴定根细胞形状突变体的遗传筛选的结果。 这些根细胞形状突变体的一些表型通过降低有效乙烯水平来改善。 这些乙烯依赖性细胞形状突变体似乎在根中定义了一条（或多条）途径，该途径与乙烯信号传导途径相互作用以确定最终的根细胞形状。 分析这两种途径中每个组分的具体作用将增加我们对细胞形状决定和细胞生长调节过程的理解。

Plant root morphology is determined by the number and shapes of the component individual root cells. Root cell shape is, in turn, the result of environmental factors affecting a fundamental genetic program. Loci involved in root cell shape determination have been identified as a result of genetic screens to identify root cell shape mutants in the simple plant Arabidopsis thaliana. The phenotypes of a number of these root cell shape mutants are ameliorated by reducing effective ethylene levels. These ethylene-dependent cell shape mutants appear to define a pathway (or pathways) in the root that interacts with the ethylene signaling pathway(s) to determine final root cell shape. Analyses of the specific roles of each of the components of these two pathways will increase our understanding of the process of cell shape determination and the regulation of cell growth.