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Bt菌株FB的生物学特性及其cry、vip基因型鉴定

王品舒1,2, 刘晓垒1, 席景会3, 彭琦1, 束长龙1, 张杰1, 宋福平   

  1. 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 100193;2. 北京市植物保护站, 北京 100029;3. 吉林大学植物科学学院, 长春 130062
  • 收稿日期:2012-12-06 修回日期:1900-01-01 出版日期:2014-02-08 发布日期:2014-02-08
  • 通讯作者: 宋福平,博士,研究员,硕士生导师,E-mail: fpsong@ippcaas.cn。

Biological Characteristics of Bacillus thuringiensis FB Strain and Identification of Its cry and vip-type Genes

WANG Pinshu1,2, LIU Xiaolei1, XI Jinghui3, PENG Qi1, SHU Changlong1, ZHANG Jie1, SONG Fuping   

  1. 1. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193;2. Plant Protection Station of Beijing, Beijing 100029;3. College of Plant Science, Jilin University, Changchun 130062, China
  • Received:2012-12-06 Revised:1900-01-01 Online:2014-02-08 Published:2014-02-08

摘要: 菌株FB是1株对小菜蛾Plutella xylostella幼虫具有高毒力的苏云金芽胞杆菌Bacillus thuringiensis(Bt)。本研究通过扫描电子显微镜、大质粒电泳、总蛋白SDS-PAGE及菌株生长特征观察的方式研究了菌株FB特征,克隆得到了基因cry1Ia、cry1Ea、cry1Ab、cry2Abvip3Aa全长,依据全基因组测序结果得到了1个cry8基因部分片段,首次在Bt菌株中同时发现基因cry1类和cry8类,这五种基因推导的氨基酸序列与已知基因序列相比,最高相似性分别为99%、98%、99%、100%、99%,而cry8半长基因与已知基因仅为63%。生测结果表明,蛋白Cry1Ia、Cry1Ea和Cry1Ab对小菜蛾幼虫具有较高杀虫活性。

Abstract: Bacillus thuringiensis FB strain was high toxicity against larvae of Plutella xylostella (L.). FB strain was characterized with scanning electron microscope, large plasmids electrophoresis, SDS-PAGE and growth characteristics observation. Five full length toxin genes, cry1Ia, cry1Ea, cry1Ab, cry2Ab and vip3Aa, were cloned. Furthermore, a half-length fragment of cry8 gene was found by whole-genome sequencing, this is the first time that cry1 and cry8-type genes existed in the same strain. The highest identity of the deduced amino acid sequences with known B. thuringiensis toxins were 99%, 98%, 99%, 100%, 99% respectively, but deduced amino acid sequence of this Cry8 fragment was 63% similarity with known Cry8 proteins. Bioassay results showed that Cry1Ab, Cry1Ia, Cry1Ea were high toxicity against larvae of P. xylostella.

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