水稻逆境相关转录因子研究进展

干旱、盐碱、高温和低温等逆境因子胁迫水稻的生长发育,进而影响水稻的产量和品质。因此,研究水稻的抗逆性,尤其是揭示其抗逆分子机理具有重要的生物学意义。近年来,水稻抗逆分子机理的研究主要集中在转录因子及其分子调控机制方面。在水稻中,目前研究较多的转录因子类型主要有b ZIP、MYB/MYC、WRKY、AP2/EREBP和NAC,它们的结构通常由DNA结合结构域、转录活化结构域、寡聚化位点和核定位信号组成。转录因子在水稻逆境信号转导途径中起着中心调节作用,它们将逆境信号传递和放大,通过与目的基因启动子区中顺式作用元件特异结合,调控下游多个逆境相关基因的表达,从而引起水稻对逆境应答反应,最终实现水稻获...

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Bibliographic Details
Published in广西植物 Vol. 35; no. 6; pp. 942 - 947
Main Author 罗成科 肖国举 李茜
Format Journal Article
LanguageChinese
Published 宁夏大学 新技术应用研究开发中心,银川,750021 2015
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Summary:干旱、盐碱、高温和低温等逆境因子胁迫水稻的生长发育,进而影响水稻的产量和品质。因此,研究水稻的抗逆性,尤其是揭示其抗逆分子机理具有重要的生物学意义。近年来,水稻抗逆分子机理的研究主要集中在转录因子及其分子调控机制方面。在水稻中,目前研究较多的转录因子类型主要有b ZIP、MYB/MYC、WRKY、AP2/EREBP和NAC,它们的结构通常由DNA结合结构域、转录活化结构域、寡聚化位点和核定位信号组成。转录因子在水稻逆境信号转导途径中起着中心调节作用,它们将逆境信号传递和放大,通过与目的基因启动子区中顺式作用元件特异结合,调控下游多个逆境相关基因的表达,从而引起水稻对逆境应答反应,最终实现水稻获得综合抗逆性的提升。该文简要概述了植物转录因子的调控机制、结构特点、分类与功能特性,重点论述了转录因子在水稻抗逆中的作用,指出了转录因子应用过程中转基因水稻产生的负效应问题,并提出了解决负效应问题的研究思路,同时展望了今后转录因子的研究前景,以期为挖掘和应用新的水稻转录因子基因以及阐明其抗逆调控机制提供理论依据。
Bibliography:LUO Cheng-Ke, XIAO Guo-Ju, LI Qian ( Development Center of New, Technique Application and Research, Ningxia University, Yinchuan 750021, China )
rice; adversity stress; stress resistance; transcriptional factor; gene expression
45-1134/Q
Adverse environmental factors,such as drought,salinization,high temperature and low temperature,severely threaten rice growth and development,and then damage rice yield and quality. Therefore,the research on rice resistance,especially dissecting molecular mechanism of rice,has important biological significance. In recent years,the reports on molecular mechanism of rice resistance have been mainly focused on isolating and identifying transcriptional factor genes as well as their regulatory mechanisms. For example,several main types of transcriptional factors,such as b ZIP,MYB / MYC,WRKY,AP2 / EREBP and NAC families,were relatively clearly studied in rice. Each of these transcriptional factors was usually composed of a DNA-binding domain,a transcription regulation domain,a oligome
ISSN:1000-3142
DOI:10.11931/guihaia.gxzw201404033