转录因子CBF在植物抗寒中的重要作用

Role of the Transcription Factors CBF in Plant Cold Tolerance

低温能够诱导植物许多基因的表达,从而使植物具有抗寒性,这种现象称为冷驯化。对于植物冷驯化的分子机理,目前研究得最多的是CBF转录因子调控的信号转导途径,其作用途径可归纳为:CBF(CrepeatBindingFactor)转录因子→CRT/DRE(Crepeat/DehydrationResponsiveElement)基序→COR基因表达→植物抗寒性增加。研究CBF转录因子在抗寒中的作用机制,能为提高植物的抗寒性,培育抗寒作物品种提供新方向。

In response to the low temperature, plants induce relevant gene expression to increase the cold tolerance. This response is called cold acclimation. The molecular mechanism for cold acclimation has been studied, suggesting that the CBF transcription activators are critical in the signal transduction of cold acclimation. The signal pathway could be summarized as, CBF transcription factors-→CRT/DRE motif domain→the expression of COR gene→plant cold tolerance. Understanding the mechanism of CBF in cold tolerance will provide a new strategy for improvement of plant cold tolerance and breeding of cold-tolerant plant.