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转石蒜凝集素基因烟草的抗蚜虫性 被引量:5

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摘要 利用农杆菌介导法将质粒pBILRA转化烟草(NicotianatabacumL.),该质粒含有由花椰菜花叶病毒35S启动子(CaMV35S)引导的筛选基因新霉素磷酸转移酶基因(nptll)及石蒜凝集素基因(lra)。通过卡那霉素筛选获得了25株独立转基因烟草植株。Westernblot分析表明,石蒜凝集素蛋白在不同转基因植株中表达量不同。对转基因T1代植株的遗传分析表明,lra基因在大多数独立转基因植株后代中以孟德尔3:1的分离比方式遗传。抗虫试验表明,表达较高水平石蒜凝集素蛋白的转基因烟草对桃蚜种群的生长具有明显的抑制作用。首次报道了表达石蒜凝集素基因的烟草对蚜虫具有抗性。石蒜凝集素基因可用于植物抗虫基因工程研究及应用。
出处 《Acta Botanica Sinica》 CSCD 2004年第7期767-772,共6页 Acta Botanica Sinica(植物学报:英文版)
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