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棉花学报  2014 

1个新棉花bHLH类基因GhbHLH130的克隆及表达分析

DOI: 1002-7807(2014)04-0363-08, PP. 363-370

Keywords: bHLH转录因子,亚细胞定位,基因表达,非生物胁迫,棉花

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Abstract:

近年来,已发现碱性/螺旋-环-螺旋(basic/Helix-Loop-Helix,bHLH)类转录因子家族在植物的生长发育调控中发挥重要作用。本研究通过电子克隆方法得到1个新的棉花bHLH类转录因子基因的全长序列,利用反转录-PCR技术从陆地棉中分离出1个bHLH类转录因子基因,并命名为GhbHLH130。该基因包含1个552bp的开放阅读框,编码184个氨基酸残基。序列分析表明GhbHLH130蛋白包含1个螺旋-环-螺旋(Helix-Loop-Helix)保守结构域,属于bHLH转录因子家族。实时荧光定量分析结果表明GhbHLH130基因的表达受干旱、高盐、低温以及外源脱落酸的显著诱导。亚细胞定位结果表明GhbHLH130基因在细胞核内表达。本研究结果表明GhbHLH130基因可能作为调控基因参与棉花的逆境应答响应过程。

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