过量表达铁蛋白基因的转基因烟草抗Co2+能力分析

Heilongjiang Medicine Journal(2009)

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Abstract
目的:将烟草铁蛋白基因NtFer1的完整cDNA序列克隆到植物表达载体pBI121中,利用农杆菌(Agrobactrium tumefaciens)介导的叶盘法将NtFer1导入烟草(Nicotiana tobacum L.)基因组.对卡那抗性植株进行PCR-Southern检测,并将进一步经Northern杂交证明NtFer1基因表达量增加的转基因株系进行抗Co2+分析.结果表明,NtFer1的过量表达提高了转基因植株的抗Co2+能力.在含150μmol·L-1 Co2+的MS培养基上,转基因植株的株高和鲜重均明显优于非转基因株系;在生理性状上表现为叶绿素含量、POD活性和SOD活性比非转基因株系明显增加,转基因植株MDA含量明显低于非转基因株系.结果表明,NtFer1大量表达能够增强转基因株系抗氧化能力,提高植物抗Co2+能力.
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Key words
Physiologic characters,Tobacco,Ferritin,cobalt stress,Genetic transformation
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