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甘蓝型油菜BnCOP9基因的克隆及其环境信号响应分析

DOI: 10.3969/j.issn.1000-7091.2012.03.002, PP. 6-11

Keywords: 油菜,BnCOP9,基因克隆,诱导表达

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Abstract:

植物COP9(Constitutivelyphotomorphogenic9)信号体(CSN)是一个多亚基复合体,而CSN8是这个复合体必不可少的亚基。为了克隆油菜CSN8基因并分析其在各种环境信号下的表达变化,以甘蓝型油菜中双9号为材料,采用同源克隆法克隆油菜CSN8(BnCOP9)cDNA。序列分析表明,BnCOP9编码的蛋白含有197个氨基酸残基,在其蛋白质中部含有1个PCI结构域,与ArabidopsisthalianaCSN8(AtCOP9)有92%的相似性。定量RT-PCR分析显示,Sclerotiniasclerotiorum、伤处理以及甲基茉莉酸快速激活BnCOP9的表达,苯丙噻重氮抑制其表达,表明BnCOP9作为各种环境信号的响应基因在水杨酸和茉莉酸信号的交叉谈话中及油菜对S.sclerotiorum和机械伤害反应的网络中起作用,这些结果为研究BnCOP9在油菜抗逆中的作用提供线索。

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