DREB转录因子与植物非生物胁迫抗性研究进展

Advances in DREB Transcription Factors and Plant Abiotic Stress Tolerance

干旱、高盐、低温等非生物逆境胁迫严重影响植物的生长发育和作物产量。转录因子在调节植物生长发育以及对外界环境胁迫的响应方面起着重要作用。DREB类转录因子即干旱应答元件结合蛋白是AP2/EREBP转录因子家族的一个亚家族,拥有保守的AP2结构域,能够与DRE/CRT顺式作用元件特异结合,在非生物逆境胁迫条件下调节一系列下游胁迫诱导逆境应答基因的表达,从而提高植物耐逆性。就DREB转录因子的结构特点、表达调控以及提高转基因植株胁迫耐受性的最新研究成果进行了评述。

Abiotic stresses such as water deficit,soil salination and low-temperature place major constraint on plant growth and crop productivity. Transcription factors play an important role in plant growth and responses to abiotic stresses. The dehydration-respon- sive element binding（DREB）transcription factors containing a conserved AP2 domain belongs to the AP2/EREBP transcription factor family. The I）REB transcription factors can take part in regulating expression of a series of stress-inducible genes in plant and improve abiotic stress tolerance by specifically interacting with DRE/CRT cis-element. In this review, we summarized the current knowledge of the structural characters and regulation of DREB and progress in improving plant stress tolerance.