欢迎访问林业科学,今天是

林业科学 ›› 2002, Vol. 38 ›› Issue (3): 102-105.doi: 10.11707/j.1001-7488.20020318

• 论文及研究报告 • 上一篇    下一篇

我国不同森林立地带Bt分离株杀虫晶体蛋白及基因分析

李长友 袁强 张永安 戴莲韵 黄大昉   

  1. 中国农业科学院植物保护研究所植物病虫害生物学国家重点实验室,北京100094;中国林业科学研究院森林保护研究所,北京100091;中国农业科学院生物技术研究所,北京100081
  • 收稿日期:2001-04-20 修回日期:1900-01-01 出版日期:2002-05-25 发布日期:2002-05-25

ANALYSIS OF INSECTICIDAL CRYSTAL PROTEIN AND ITS CRY-TYPE GENES OF BACILLUS THURINGIENSIS ISOLATES FROM CHINA

Li Changyou,Yuan Qiang,Zhang Yong′an,Dai Lianyun,Huang Dafang   

  1. Institute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing100094;Institute of Forest Protection, CAF Beijing100091;Biotechnology Research Institute, Chinese Academy of Agricultural Sciences Beijing100081
  • Received:2001-04-20 Revised:1900-01-01 Online:2002-05-25 Published:2002-05-25

摘要:

利用苏云金芽孢杆菌cry基因的PCR RFLP鉴定体系和SDS-PAGE方法分析了来自我国不同森林立地带土壤中的72株苏云金芽孢杆菌的cry1、cry2、cry3、cry4、cry5、cry8、cry9、cry10、cry11、cry1I等10类基因类型和表达蛋白,并进行了杀虫活性的生物测定。研究表明:同时含有cry1,cry2 ,cry1I 3类基因的有21株菌,6株菌含有cry1,cry2类基因,4株菌含有cry1和cry1I类基因,只含有cry1基因的有1株,cry2类基因的4株,36株菌不含所鉴定的10类cry基因。同时证明,绝大多数含有cry1基因的菌株表达了130kDa蛋白,含有cry2基因的菌株表达了60kDa蛋白。生物活性测定表明,共同含有cry1Aa、cry1Ac和cry2基因的菌株对棉铃虫幼虫具有较强的杀虫活性,只含有单一基因和不含上述基因的菌株杀虫活性较弱。

关键词: 苏云金芽孢杆菌, 杀虫晶体蛋白, cry基因, PCR-RFLP, 生物测定

Abstract:

Based on the method of PCR-RFLP and SDS-PAGE,cry genes and their expression products of 72 isolates of Bacillus thuringiensis from different forestry site zones in China were analyzed. Result showed that twenty one strains contained three cry type genes: cry1,cry2 and cry1I, six strains contained both cry1 and cry2 genes, four strains contained both cry1 and cry1I type genes, one strain contained cry1 type gene, four strains contained cry2 type gene. 36 strains did not contain ten cry type genes. Most cry1 genes encoded 130 kDa protein toxic to Lepidopteran pest, and most cry2 genes encoded 60 kDa protein.The isolates containing cry1Aa,cry1Ac and cry2 type genes were highly toxic to Helicoverpa armigera larvae, isolates containing one or no cry gene had low or no toxicity activity to pests.

Key words: Bacillus thuringiensis, ICPs, cry gene, PCR-RFLP, SDS-PAGE, Bioassay