| 摘要: |
| 转录因子是杨树干旱胁迫应答分子调控网络中的重要组成部分之一，通过特异性结合干旱响应相关基因启动子区的顺式作用元件，调控下游靶基因的转录表达，从而参与杨树干旱胁迫响应过程。杨树WRKY、NAC、bZIP、MYB和AP2/ERF是干旱胁迫响应分子机制研究中最主要的五大转录因子家族，每个家族拥有超过80个成员。本文简要介绍了杨树干旱胁迫转录组学研究进展，系统总结和概括了杨树这五类转录因子的结构特征与亚家族分类、调控下游靶基因表达的方式及其在参与调控干旱信号转导网络中的作用等方面的研究进展，并对存在的问题与未来研究进行展望，旨在深入了解杨树耐旱分子机理，为培育抗旱型杨树新品种提供参考。 |
| 关键词: 干旱胁迫 杨树 转录因子 顺式作用元件 转录组 |
| DOI： |
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| 基金项目:江苏省自然科学基金青年基金项目（BK20150879） |
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| Research progress on drought-responsive transcription factors of Populus |
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ZHANG Xueli,CHEN Ying,HUANG Minren,et al
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| Abstract: |
| Transcription factors are important components of transcriptional regulatory network of poplar in response to drought stress.The downstream target genes,such as drought-responsive genes,can be transcriptionally regulated by binding of transcription factors to specific cis-acting elements in their promoter region.Thus,transcription factors play a leading role in response of poplar to drought stress.WRKY,NAC,bZIP,MYB and AP2/ERF transcription factors in poplar genome are the five most important families involved in the drought-responsive molecular process,with >80 members in each family.This article briefly introduces the research progress of poplar drought-responsive transcriptomes and comprehensively summarizes structural characteristics and subfamily classification of the five transcription factor families,the way they transcriptionally regulate downstream target genes,and their role in poplar drought-responsive signaling network.We also pinpoint existing problems and future research directions in understanding drought-responsive transcription factors in poplar.The paper aims at understanding the molecular mechanism underlying drought tolerance in poplar and provides references for cultivating new drought resistant poplar varieties. |
| Key words: drought stress poplar transcription factor cis-acting element transcriptome |
