植物能感知、传递逆境胁迫信号,诱导相关功能的基因表达,在生理生化上作出适应性响应。转录因子在信号的传递、相关功能基因的表达调控以及发育阶段的调控中起着重要的作用。Sakuma等人将拟南芥中的145个AP2/EREBP转录因子分成5类:AP2类(14 genes),RAV类(6 genes),DREB类(即CBF,56 genes),ERF类(即EREBP,65 genes)和其它(4 genes)。其中,DREB和ERF类转录因子可能参与了生物胁迫和非生物胁迫响应。
DRE/CRT元件位于受干旱或低温调控的RD/COR(responsive to dehydration/cold-regulated)基因的启动子区,DREB转录因子通过结合DRE/CRT元件参与非生物胁迫响应;ERE元件位于抗病相关PR(pathogenesis-related)基因的启动子区,ERF转录因子可能通过与ERE元件的互作参与抗病性响应。
近年来,AP2/EREBP转录因子倍受重视,研究表明,DREB和ERF类转录因子可以用于改良农作物对生物胁迫和非生物胁迫的耐性。本实验旨在利用...
【英文摘要】
Plants have evolved to perceive different stress signals from their surroundings, to integrate them and to respond to these different stresses by modulating the expression of related genes. Transcription factors play vital roles in stress signal transduction, gene expression modulation and phase transition during plant development. The 145 AP2/EREBP transcription factors were classified into five groups: AP2 (14 genes), RAV (6 genes), DREB (also referred as CBF, 56 genes), ERF (also referred as EREBP, 65 ge...