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苏云金芽孢杆菌的筛选和初步鉴定
引用本文:李凤梅,李平,闫敏,郑爱萍,孙惠青.苏云金芽孢杆菌的筛选和初步鉴定[J].生物技术,2003,13(6):34-36.
作者姓名:李凤梅  李平  闫敏  郑爱萍  孙惠青
作者单位:四川省农业生物技术工程研究中心,四川农业大学水稻研究所,四川,温江,611130
基金项目:国家十五“863”高科技资助项目 (2 0 0 2AA2 1 2 1 51 )
摘    要:采集四川温江昆虫孳生地的土壤样本94份,利用醋酸钠-抗生素法分离、筛选,共获得苏云金芽孢杆菌9株。镜检可观察到大菱形、小菱形、方形、圆形等四种主要形态的伴胞晶体;采用cryⅠ、cryⅡ、cryⅢ、cryⅤ基因的通用对9株Bt分离菌进行的PCR检测结果表明:9株菌全部含cryⅠ和cryⅤ基因,2株菌含cryⅡ基因,5株菌含cryⅢ基因,而且各菌株均包含2—3个基因型。利用这些菌株对菜青虫进行了室内和室外生物毒力测定,达到了较好的杀虫效果。

关 键 词:苏云金芽孢杆菌  筛选  鉴定  伴胞晶体  菜青虫  杀虫微生物
文章编号:1004-311X(2003)06-0034-03
修稿时间:2003年3月26日

Screening and Identification of Bacillus thuringiensis
LI Feng-mei,LI Ping,YAN Min,ZHENG Ai-ping,SUN Hui-qing.Screening and Identification of Bacillus thuringiensis[J].Biotechnology,2003,13(6):34-36.
Authors:LI Feng-mei  LI Ping  YAN Min  ZHENG Ai-ping  SUN Hui-qing
Abstract:9strains of Bacillus thurigiensis were isolated from 94 samples of pest habitats soils from Wenjiang in Sichuan by Sodium acetate-antibiotic method.Four mainly parasporal crystal shapes can be visualized by microscopic observation.The genotypes of 9 Bt isolates were identified by Polymerase Chain Reaction method with general primers of cryI,cryII,cryIII,and cryV genes respectively.The result is that all of them contain cryI and cryV genes,2 strains have cryII genes,5 stains contain cryIII genes,and each strain contains 2 or 3 kinds of genes.These Bt strains were high toxic to Pieris rapae in vitro and the field test.
Keywords:Bacillus thuringiensis  Sodium acetate-antibiotic  parasporal crystal  PCR  Pieris rapae
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