棉 花 学 报   Cotton Science  2005,17(6):366-370

 

AP2基因家族的起源和棉花AP2转录因子在抗病中的作用
秦  捷1,王  武2,左开井1,唐克轩1
(1.上海交通大学植物生物技术研究中心,上海 200030;2.农业部棉花遗传改良重点开放实验室
中国农业科学院棉花研究所,河南 安阳 455000)

摘要植物中庞大的AP2基因家族成员因其广泛参与植物响应外界环境胁迫、生长发育相关的转录调控而备受重视。AP2基因曾被认为植物所特有,但最近在蓝藻、线虫和病毒中发现了具有AP2结构域和位点特异核酸内切酶的蛋白。所以有人认为当今植物中的AP2基因起源于细菌或者病毒的基因的横向转移,AP2结构域可能来自后来进化为叶绿体的原始蓝细菌的内共生。ERF是AP2大家族中的一个亚族,它编码的蛋白能特异结合含有GCC盒的病程相关基因的表达,参与植物抗病反应。ERF基因的表达受到疾病相关刺激以及环境胁迫的诱导,并且在乙烯、茉莉酸和水杨酸信号传导途径中发挥一定的作用。同时,某些ERF基因在转基因植物中的超表达表现了一定的广谱抗性,因而在分子育种中具有一定的应用前景。棉花上AP2基因家族的基因克隆与分析最近才得以进行,介绍了我们在棉花上相关的研究工作并讨论了它们在植物抗病反应中的作用。
关键词AP2基因;转录调控;起源;抗病反应
中图分类号S562.035      文献标识码:A
文章编号1002-7807(2005)06-0366-05     [全文,2355KB]

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