木本植物次生维管系统形态建成的基因调控与信号转导研究进展

Progress in Study on the Gene Regulation and the Signal Transduction in the Morphogenesis of Secondary Vascular System in Woody Plants

树木的次生生长决定着木材的产量,具有重要的经济价值。围绕着草本模式植物拟南芥和木本模式植物杨树,对近年来有关维管组织形态建成的信号机制与基因调控的研究进展进行概括,主要内容为:维管组织的功能与形成;维管形成层的细胞类型及基因表达特异性;木质部和韧皮部细胞极性的有关关键基因;维管形成层干细胞的分化机制;维管组织发育中的激素调控网络。重点对比拟南芥和杨树这2种模式物种之间的异同。

The secondary growth of trees determines timber production and has important economic value.In this review,we focus on a woody model plant,poplar,and a herbaceous model plant,Arabidopsis thaliana,and describe the signaling mechanism and gene regulation responsible for the vascular morphogenesis and functional organization.The main content is divided into several parts including vascular tissue function and formation,vascular cambium cell types and gene expression specificity,xylem and phloem key genes related to cell polarity,vascular cambium stem cell differentiation mechanisms,and the hormone regulatory networks in developing vascular tissues,with the emphasis on comparison of similarities and differences between the two species models.