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中国生物防治学报 ›› 2018, Vol. 34 ›› Issue (5): 708-714.DOI: 10.16409/j.cnki.2095-039x.2018.05.009

• 研究论文 • 上一篇    下一篇

高原草地杀蝗菌株嗜烟碱节杆菌Arthrobacter nicotinovorans的分离鉴定及发酵条件优化

刘英, 岳莹, 查艳梅, 金洪, 侯太平, 陶科   

  1. 四川大学生命科学学院/生物资源与生态环境教育部重点实验室, 成都 610064
  • 收稿日期:2018-02-05 出版日期:2018-10-08 发布日期:2018-10-15
  • 通讯作者: 陶科,博士,副教授,E-mail:taoke@scu.edu.cn。
  • 作者简介:刘英,硕士研究生,E-mail:1546526137@qq.com
  • 基金资助:
    国家重点科研计划(2016YFC0502004)

Isolation and Identification for Arthrobacter nicotinovorans against Locust from Qinghai-Tibetan Plateau and Optimization of Culture Conditions

LIU Ying, YUE Ying, ZHA Yanmei, JIN Hong, HOU Taiping, TAO Ke   

  1. Key Laboratory of Bio-resource and Eco-environment, Ministry of Education/College of Life Sciences, Sichuan University, Chengdu 610064, China
  • Received:2018-02-05 Online:2018-10-08 Published:2018-10-15

摘要: 从青藏高原采集的土壤中筛选到一株具有杀蝗虫活性的细菌,根据菌株形态和生理生化特征,结合16S rRNA序列分析,鉴定为嗜烟碱节杆菌Arthrobacter nicotinovorans,编号GZ1-6。室内测定了菌株GZ1-6对东亚飞蝗若虫的致病力,结果显示菌株GZ1-6菌悬液对若虫的校正死亡率达到75.56%。测定了碳氮源、温度、初始pH、装液量以及培养时间对菌株GZ1-6生长和杀虫活性的影响,得到菌株GZ1-6分别在以蔗糖和酵母浸膏为碳氮源,pH 7.5、恒温35℃的条件下生长最好,培养2 d,杀蝗活性较优化前提高了7.77%。菌株GZ1-6能够有效侵染东亚飞蝗并将其致死,可作为优良菌株进行杀蝗虫生物农药的进一步研发。

关键词: 分离鉴定, 嗜烟碱节杆菌, 东亚飞蝗, 毒力测定, 发酵条件优化

Abstract: A bacteria strain selected from the soil of Qinghai-Tibetan Plateau was identified as Arthrobacter nicotinovorans and named GZ1-6 based on the 16S rRNA sequence analysis, physiological and biochemical characteristics. Virulence of GZ1-6 to nymph of Locusta migratoria manilensis was evaluated in the laboratory, with a corrected accumulative mortality over 75.56%. The optimum fermentation conditions were determined to be temperature 35℃, pH 7.5, sucrose and yeast extract as carbon and nitrogen source, respectively. The optimized fermentation products showed a 7.7% higher toxicity against L. migratoria manilensis compared with pre-optimum. The results indicate that the strain GZ1-6 can be used as a potential biocontrol agent against the locust in the field.

Key words: isolation and identification, Arthrobacter nicotinovorans, Locusta migratoria manilensis, toxicity test, optimized fermentation condition

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