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苏云金芽孢杆菌SHJ-5菌株杀虫晶体蛋白基因分析

DOI: 10.7668/hbnxb.2011.04.034, PP. 194-197

Keywords: 苏云金芽孢杆菌,PCR-RFLP,克隆,杀虫活性

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Abstract:

苏云金芽孢杆菌SHJ-5菌株是从黑龙江采集的土样中分离获得的新菌株,对其伴孢晶体形状、基因型、蛋白表达以及杀虫活性进行了系统研究。菌株SHJ-5产生的伴孢晶体形状为钝菱形;利用PCR-RFLP技术对该菌株的基因型进行鉴定,结果表明,该菌株含有cry1Aa、cry1Ea、cry1Be、cry1Ah、cry1Ai、cry2Ab、cry1i和vip3A基因;SDS-PAGE晶体蛋白检测结果显示,该菌株表达130～150kDa和60kDa大小蛋白;生物活性测定表明,菌株SHJ-5对棉铃虫和小菜蛾有较高杀虫活性,校正死亡率分别为100%和96.7%。

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