生物技术通报 ›› 2014, Vol. 0 ›› Issue (9): 109-113.

• 研究报告 • 上一篇    下一篇

一株具有杀虫活性真菌的筛选及活性物质稳定性研究

何海波1,3,钟娟1,2,3,杨杰1,2,周金燕1,2,谭红1,2   

  1. 1.中国科学院环境与应用微生物重点实验室,成都 610041;
    2.四川省环境微生物重点实验室,成都 610041;
    3.中国科学院大学,北京 100049
  • 收稿日期:2014-02-12 出版日期:2014-09-15 发布日期:2014-09-07
  • 作者简介:何海波,男,硕士研究生,研究方向:应用微生物学;E-mail:chinahehaibo@qq.com
  • 基金资助:
    国家科技支撑计划课题(2011BAE06B04-03 )

Screening of a Fungus with Insecticidal Activity and Measure of the Stability of Its Bioactive Compound

He Haibo1,3,Zhong Juan1,2,3,Yang Jie1,2,Zhou Jinyan1,2,Tan Hong1,2   

  1. 1. Key Laboratory of Environmental and Applied Microbiology,Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041;
    2. Environmental Microbiology Key Laboratory of Sichuan Province,Chengdu 610041;
    3. University of Chinese Academy of Science,Beijing 100049
  • Received:2014-02-12 Published:2014-09-15 Online:2014-09-07

摘要: 以卤虫为初筛指示虫,以蚜虫为复筛指示虫,从广西玉林土壤分离筛选出具有杀虫活性的菌株YLZ42。根据培养特征、形态特征及18SrDNA、ITS序列分析,菌株YLZ42被鉴定为淡色生赤壳菌(Bionectriaochroleuca)。生物测定结果表明,YLZ42发酵液的乙酸乙酯萃取物对小菜蛾、棉铃虫、甜菜夜蛾具有明显的毒杀活性,其校正死亡率在78.9%以上。YLZ42发酵液稳定性研究表明,其活性成分在100℃处理60min,pH1-11条件下仍具有较强的杀虫活性。

关键词: 真菌, 卤虫, 杀虫活性, 淡色生赤壳菌

Abstract: Using Brine Shrimp as primary screening assay and Aphid as second screening assay, the YLZ42 strain with insecticidal activity were isolated and screened from the soil in Yulin, Guangxi Province. According to the culture features, morphological characteristics, 18S rDNA and ITS sequence analysis, YLZ42 was identified as Bionectria ochroleuca. The ethyl acetate extract of YLZ42 fermentation broth have insecticidal activity to Plutella xylostella, Helicoverpa armigera and Laphygma exiguat. Results of bioassay showed that the corrected mortalities rate were more than 78.9%. The fermentation broth have high insecticidal activity under 100℃ for 60 min or pH1-11.