植物Trihelix转录因子响应非生物胁迫的研究进展

Research Progress on Response of Plant Trihelix Transcription Factor to Abiotic Stress

Trihelix转录因子家族因其特有的三螺旋结构域(螺旋-环-螺旋-环-螺旋)而命名,该结构域高度保守,能与GT元件特异性地结合,因此该家族又被称为GT因子家族。Trihelix转录因子家族分为GT-1、GT-2、GTγ、SH4和SIP1等5个亚家族。前期研究表明Trihelix转录因子不仅调控光应答基因的表达,还参与植物生长发育的各个过程,同时受高盐、干旱、冷害和病害的强烈诱导,广泛参与植物对生物和非生物胁迫的应答反应。Trihelix转录因子通过与其他基因互作等方式调控下游靶基因的表达,从而响应生物和非生物胁迫。本综述对植物Trihelix转录因子的结构特征及生物学功能进行介绍,详细阐述Trihelix转录因子在草本和木本植物中响应非生物胁迫的最新研究进展,为深入探究Trihelix转录因子响应非生物胁迫的分子机制提供理论基础。

Trihelix transcription factor family is named for its unique triple helix domain(helix-loop-helix-loop-helix), which is highly conserved and can specifically bind to GT elements. Therefore, it is also called GT factor family. Trihelix transcription factor family is divided into five subfamilies: GT-1, GT-2, GTγ, SH4 and SIP1. Previous studies have shown that Trihelix transcription factor not only regulates the expression of photoresponse genes, but also participates in various processes of plant growth and development. At the same time, it is strongly induced by high salt, drought, chilling injury and diseases, and widely participates in responses of plant to biotic and abiotic stresses. Trihelix transcription factor regulates the expression of downstream target genes by interacting with other genes, thus responding to biotic and abiotic stresses. Here, the structures and biological functions of plant Trihelix transcription factors were introduced. The latest research progress of Trihelix transcription factor in response to abiotic stress in herbs and woody plants was elaborated in detail, which could provide a theoretical basis for further study on the molecular mechanism of Trihelix transcription factor responding to abiotic stress.