摘要
木质部是维管植物运输土壤水分和可溶性物质的复合组织,由管状分子、木薄壁细胞以及木纤维3部分组成,其中管状分子和木纤维细胞均能发生次生细胞壁加厚,为植物生长发育提供必要的支撑。对木质部次生细胞壁加厚转录因子的共同调控网络的研究进展进行综述,其中以NAC-MYB为核心的转录调控网络在该过程中扮演着关键性的作用;NAC转录因子家族可根据其调控部位分为VND基因家族、NST1/NST3转录因子和NST1/NST2转录因子,并直接调控下游MYB转录因子家族的表达,影响次生细胞壁的加厚。并以拟南芥、水稻、杨树等模式植物为例梳理调控机制,以便能更好的加深对植物木质部次生细胞壁加厚过程中转录调控的理解。
The xylem is a compound tissue in vascular plants,responsible for transportation of soil moisture and soluble substances.It is composed of 3 parts:tracheary element,xylem parenchyma and xylon.Tracheary element and xylon cell can undergo secondary wall thickening and provide the necessary support for plant growth and development.The secondary cell wall thickening is a complex and orderly process,which is jointly regulated by multiple transcription factors,and the NAC-MYB based transcription regulatory network plays the key role in this process.The NAC transcription factor family can be divided into VND gene family,NST1/NST3 transcription factor and NST1/NST2 transcription factor according to their regulatory positions,and directly regulate the expression of downstream MYB transcription factor family,affecting the thickening of secondary cell walls.Recent studies have accumulated more evidences to support this regulatory network.This paper aims to reorganize and sort out the recent relevant results through integrating the studies in Arabidopsis thaliana,Oryza sativa,Populus sp.and other model plants,in order to better understand the transcriptional regulation during the thickening of the xylem secondary wall.
作者
文静
王春涛
杨永平
Wen Jing;Wang Chuntao;Yang Yongping(Kunming Institute of Botany,Chinese Academy of Sciences,Kunming Yunnan 650201,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2021年第2期182-188,共7页
Journal of Southwest Forestry University：Natural Sciences
基金
国家自然科学基金委重大项目(31590823)资助。
关键词
木质部
次生细胞壁
转录因子
调控网络
xylem
secondary cell wall
transcription factor
regulatory network
