School of Biological Sciences, College of Natural Science, Seoul National University, Seoul 08826, Republic of Korea.
School of Biological Sciences, College of Natural Science, Seoul National University, Seoul 08826, Republic of Korea; Plant Genomics and Breeding Institute, Seoul National University, Seoul 08826, Republic of Korea.
Curr Opin Plant Biol. 2020 Oct;57:110-117. doi: 10.1016/j.pbi.2020.08.002. Epub 2020 Sep 7.
Cascades of temporal and spatial regulation of gene expression play crucial roles in the vascular development in plant roots. Once vascular cell fates are determined, the timing of their differentiation is tightly controlled in a cell-autonomous manner. In contrast, extensive cell-to-cell communication contributes to the positioning and specifying of vascular cell types in the root meristem. Diverse factors moving short distances in a radial direction were found to be key contributors to these processes. Furthermore, signals from differentiated phloem were found to influence the phloem precursor and determine how the corresponding asymmetric cell division proceeded. These findings highlight the potential importance of underexplored types of intercellular communication in relation to vascular tissue development during postembryonic root growth.
基因表达的时空调控级联在植物根的血管发育中起着至关重要的作用。一旦血管细胞命运确定，其分化的时间就以细胞自主的方式被严格控制。相比之下，广泛的细胞间通讯有助于根分生组织中血管细胞类型的定位和指定。在径向短距离移动的各种因素被发现是这些过程的关键贡献者。此外，来自分化的韧皮部的信号被发现影响韧皮部前体细胞，并决定相应的不对称细胞分裂如何进行。这些发现强调了在胚胎后根生长过程中，与血管组织发育相关的细胞间通讯的潜在重要性。
