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棉花学报  2012 

陆地棉GhERF8基因的克隆与表达分析

DOI: 1002-7807(2012)06-0488-08, PP. 488-495

Keywords: 乙烯响应元件结合因子,陆地棉,激素处理,荧光定量PCR

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Abstract:

乙烯响应元件结合因子(Ethylene-responsiveelement-bindingfactor,ERF)是植物中最大的转录因子家族之一。本研究以棉花叶片cDNA文库为基础,从陆地棉中棉所10号中克隆得到一个新的ERF基因,命名为GhERF8(GenBankJN656957)。该基因编码265个氨基酸,蛋白序列中包含一个AP2保守结构域。采用荧光定量PCR(RT-PCR)的方法,对GhERF8基因在棉株不同生育时期叶片和不同组织中的表达水平进行了定量分析。结果表明,GhERF8基因在各组织中均有表达,但在成熟后期的叶片中表达量最高。GhERF8表达量与叶片衰老过程中叶绿素含量出现相反的变化趋势,推测GhERF8可能与叶片衰老有一定关系。在乙烯利和茉莉酸处理下GhERF8基因在叶片中上调表达,而在脱落酸处理下GhERF8表达量无显著变化,推测GhERF8可能处于乙烯和茉莉酸信号转导网络中,且表达途径为非ABA依赖途径。

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