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中国生物防治学报 ›› 2020, Vol. 36 ›› Issue (5): 786-794.DOI: 10.16409/j.cnki.2095-039x.2020.05.019

• 研究论文 • 上一篇    下一篇

贝莱斯芽胞杆菌JTB8-2的筛选、鉴定及其对瓜列当拮抗作用研究

何伟, 罗文芳, 许建军, 孙晓军   

  1. 新疆农业科学院植物保护研究所/农业部西北荒漠作物有害生物综合治理重点实验室, 乌鲁木齐 830091
  • 收稿日期:2020-04-22 出版日期:2020-10-08 发布日期:2020-11-20
  • 通讯作者: 许建军,研究员,E-mail:xjj72@163.com。
  • 作者简介:何伟,硕士,副研究员,E-mail:181113882@qq.com
  • 基金资助:
    农业部西北荒漠绿洲作物有害生物综合治理重点实验室开放基金(KFJJ202001);新疆农业科学院青年科技骨干创新能力培养项目(xjnkq-2019017)

Screening, Identification and Antagonistic Effect of Bacillus velezensis JTB8-2 on Orobanch eaegyptaica

HE Wei, LUO Wenfang, XU Jianjun, SUN Xiaojun   

  1. Key Laboratory of Integrated Pest Management on Crops in Northwestern Oasis, Ministry of Agriculture/Institute of Plant Protection, Xinjiang Academy of Agriculturel Sciences, Urumqi 830091, China
  • Received:2020-04-22 Online:2020-10-08 Published:2020-11-20

摘要: 为了筛选适宜新疆本地田间土壤环境且对瓜列当具有生防潜力的微生物,本研究采集加工番茄田罹病瓜列当根际土壤,分别采用稀释涂布平板法分离和滤纸平板法筛选到一株瓜列当生防菌JTB8-2,经形态学和分子生物学鉴定为贝莱斯芽胞杆菌Bacillus velezensis。菌株JTB8-2发酵液25、50、100、250和500倍液对瓜列当种子萌发校正抑制率分别为100%、100%、93.60%、43%和32.59%,其250和500倍液对瓜列当种子萌发校正抑制率显著高于其他菌株;浓度为1和0.5 μg/mL菌株发酵液粗提物对瓜列当种子萌发抑制率分别为100%和53.25%;浇灌浓度约5×105cfu/mL菌株发酵液对瓜列当防治效果为66.51%。该菌株具有防治瓜列当的潜力,可以作为新疆本地瓜列当防治生防菌资源。

关键词: 贝莱斯芽胞杆菌, 瓜列当, 拮抗作用

Abstract: In order to screen the microorganisms which are suitable for the local soil environment in Xinjiang and have the biocontrol potential for O. eaegyptaica, The JTB8-2 was isolated from the rhizosphere soil of diseased O. eaegyptaica in processing tomato field by dilution coating plate method and filter paper plate method respectively. It was identified as B. velezensis by morphology and molecular biology. The corrected inhibition rates for seed germination of 25, 50, 100, 250 and 500 time strain fermentation broth were 100%, 100%, 93.60%, 43% and 32.59% respectively, the inhibition rates of 250 and 500 fermentation broth had significantly higher than other strains; the inhibition rates of the crude extracts of 1 μg/mL and 0.5 μg/mL were 100% and 53.25% respectively; the control effect was 66.51% by irrigating the fermentation broth with concentration of 5×105 cfu/mL. The strain had the potential to control O. eaegyptaica, and can be used as a local biocontrol resource in Xinjiang.

Key words: B. velezensis, O. eaegyptaica, antagonistic effect

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