A novel two-component hybrid molecule regulates vascular morphogenesis of the Arabidopsis root
A novel two-component hybrid molecule regulates vascular morphogenesis of the Arabidopsis root
复制标题
DOI：
10.1101/gad.189200
复制
发表时间：
2000-12-01
影响因子：
10.5
通讯作者：
Helariutta, Y
中科院分区：
文献类型：
--
作者：
Mähönen, AP;Bonke, M;Helariutta, Y
维管系统（由木质部、韧皮部和[原]形成层组成）的发育个体发生尽管在植物生理学中起着重要作用，但人们对其了解甚少。我们发现，在拟南芥根分生组织，木质部细胞谱系指定早期，而韧皮部和原形成层是通过一组不对称的细胞分裂。这些分裂需要WOODEN LEG（WOL）基因。WOL基因编码一种新型的双组分信号转换器，具有两个接收器结构域的不寻常的串联排列。从胚胎发生的早期阶段开始，它在脉管系统中特异性表达，这与作为血管形态发生的传感器的作用一致。
The developmental ontogeny of the vascular system (consisting of xylem, phloem and [pro]cambium) is poorly understood despite its central role in plant physiology. We show that in the Arabidopsis root meristem, xylem cell lineages are specified early, whereas phloem and procambium are established through a set of asymmetric cell divisions. These divisions require the WOODEN LEG (WOL) gene. The WOL gene encodes a novel two-component signal transducer with an unusual tandem arrangement of two receiver domains. It is expressed specifically in the vasculature from the early stages of embryogenesis on, consistent with a role as a sensor for vascular morphogenesis.