Salvi Elena, Di Mambro Riccardo, Sabatini Sabrina
Department of Biology and Biotechnology "Charles Darwin", Laboratory of Functional Genomics and Proteomics of Model Systems, Sapienza University of Rome, Rome, Italy.
Department of Biology, University of Pisa, Pisa, Italy.
J Exp Bot. 2020 Apr 23;71(8):2390-2396. doi: 10.1093/jxb/eraa079.
The root of the plant Arabidopsis thaliana is a dynamic structure in which cells continuously divide and differentiate to sustain its postembryonic undetermined growth. Cells at different developmental stages are organized in distinguished zones whose position and activities are maintained constant during root growth. In this review, we will discuss the latest discoveries on the regulatory networks involved in root zonation and, in particular, in the mechanisms involved in maintaining the position of the transition zone, a root developmental boundary. Developmental boundaries physically divide cells with different functions and identities. The transition zone separates dividing cells from differentiating cells in two functional domains, preserving their identity during root growth and thus controlling root development.
拟南芥的根是一个动态结构，其中细胞不断分裂和分化，以维持其胚后不确定生长。不同发育阶段的细胞组织在不同的区域，这些区域的位置和活动在根生长过程中保持不变。在这篇综述中，我们将讨论根分区调控网络的最新发现，特别是维持过渡区（一个根发育边界）位置所涉及的机制。发育边界在物理上分隔具有不同功能和特性的细胞。过渡区在两个功能域中将分裂细胞与分化细胞分开，在根生长过程中保持它们的特性，从而控制根的发育。
