Department of Biological and Environmental Sciences/Institute of Biotechnology, University of Helsinki, P.O. Box 65, 00014 Helsinki, Finland.
Curr Opin Plant Biol. 2010 Feb;13(1):59-65. doi: 10.1016/j.pbi.2009.09.004. Epub 2009 Sep 25.
The plant vascular system consists of two conductive cell types, xylem and phloem, which are both produced by procambial cells. Recently, several novel regulatory mechanisms that control the specification of vascular patterning and differentiation have been uncovered. The non-cell-autonomous TDIF/CLE signalling mediates phloem-xylem cross-talk and cambial maintenance; a flowering-related long-distance signal governs secondary development; and novel genetic players such as LHW regulate vascular morphogenesis. A future challenge is to conflate data on the various genetic, hormonal and other factors to understand the networks underlying vascular tissue formation.
植物维管系统由两种可传导的细胞类型组成，木质部和韧皮部，它们均由原形成层细胞产生。最近，人们发现了几个控制血管模式形成和分化的新调控机制。非细胞自主的 TDIF/CLE 信号介导韧皮部-木质部的对话和形成层的维持；与开花相关的远距离信号调控次生生长；而 LHW 等新型遗传因子则调控维管束形态发生。未来的挑战是整合各种遗传、激素和其他因素的数据，以了解血管组织形成的网络。
