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核农学报  2014 

花生中胁迫相关基因AhDHN1的克隆及非生物胁迫下表达分析

DOI: 10.11869/j.issn.100-8551.2014.12.2159, PP. 2159-2166

Keywords: 花生,脱水素,表达分析,非生物胁迫

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Abstract:

低温、高盐和干旱胁迫严重影响作物的生长和产量。为了挖掘花生逆境胁迫相关功能基因,本研究以花生品种花育33号为试验材料,根据cDNA文库中已知的脱水素(dehydrin,Dhn)基因全长序列设计引物,通过RT-PCR克隆到该基因,并命名为AhDHN1。该基因编码框为384bp,编码128个氨基酸。序列分析表明该氨基酸序列含有两个保守的富含赖氨酸片段和一个保守的富含丝氨酸片段,表明该蛋白为K2S型脱水素。荧光定量PCR结果显示,AhDHN1基因在花生的叶片和根中对低温没有明显响应,对高盐和干旱胁迫则有明显响应,说明该基因可能参与了花生对高盐和干旱胁迫的适应性调控。本研究为阐明花生抗逆分子机理提供了理论基础,为花生抗逆分子育种提供了新的基因资源。

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