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中国生物防治学报 ›› 2024, Vol. 40 ›› Issue (3): 670-678.DOI: 10.16409/j.cnki.2095-039x.2024.02.025

• 研究论文 • 上一篇    

黄瓜霜霉病生防菌ZF515分离鉴定及防效试验

闫丽霞1, 李磊1, 丁常宗1, 杨静静2, 石延霞1, 柴阿丽1, 范腾飞1, 李宝聚1, 谢学文1,2   

  1. 1. 中国农业科学院蔬菜花卉研究所/蔬菜生物育种全国重点实验室, 北京 100081;
    2. 中蔬生物科技(寿光)有限公司, 潍坊 262704
  • 收稿日期:2023-10-31 发布日期:2024-06-07
  • 通讯作者: 李宝聚,男,研究员,E-mail:libaoju@caas.cn;谢学文,男,研究员,E-mail:xiexuewen@caas.cn。
  • 作者简介:闫丽霞,女,硕士研究生,E-mail:2496566268@qq.com;李磊,男,副研究员,E-mail:lilei01@caas.cn

Isolation, Identification of Antagonistic Bacteria ZF515 and Its Biocontrol Effect on Cucumber Downy Mildew

YAN Lixia1, LI Lei1, DING Changzong1, YANG Jingjing2, SHI Yanxia1, CHAI Ali1, FAN Tengfei1, LI Baoju1, XIE Xuewen1,2   

  1. 1. State Key Laboratory of Vegetable Biobreeding/Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2. China Vegetable Biotechnology (Shouguang) CO., Ltd, Weifang 262700, China
  • Received:2023-10-31 Published:2024-06-07
  • Contact: 国家重点研发计划(2022YFD1602403-6);国家大宗蔬菜产业技术体系(CARS-25);中国农业科学院科技创新工程项目(CAAS-ASTIPIVFCAAS);农业农村部园艺作物生物学与种质创制重点实验室
  • Supported by:
    10.16409/j.cnki.2095-039x.2024.02.025

摘要: 霜霉病是黄瓜栽培中最常见的一种具有毁灭性的病害,常造成巨大的经济损失。生物防治是一种能够有效防治作物病害且环境友好的重要措施。为筛选出有效防治黄瓜霜霉病的生防菌株,从黄瓜根际土样中分离获得121株芽胞杆菌。采用盆栽试验方法筛选获得8株对黄瓜霜霉病具有良好防效的生防菌。使用这8株生防菌在不同地区大棚内进行田间试验,确定生防菌株ZF515对黄瓜霜霉病具有稳定防效,防效高达71.47%。根据形态特征、生理生化特性以及多基因系统发育树分析确定ZF515菌株为贝莱斯芽胞杆菌Bacillus velezensis。采用平板对峙法明确ZF515菌株对8种不同病原真菌均具有抑制作用。综上所述,菌株ZF515对黄瓜霜霉病具有很好的生防潜力,是一株具有开发利用价值的生防菌株。

关键词: 贝莱斯芽胞杆菌, 黄瓜霜霉病, 拮抗菌, 菌株鉴定, 防治效果

Abstract: Downy mildew is one of the most common and destructive diseases in cucumber cultivation, often causing great economic losses. Biological control is an important measure that can effectively control crop diseases and is environmentally friendly. In order to screen out the biocontrol strains that can effectively control downy mildew of cucumber, 121 Bacillus strains were obtained by isolating soil samples from the inter-root of diseased cucumber. Eight strains with good efficacy against cucumber downy mildew were obtained under the condition of potted plants in greenhouse. Using these eight strains to carry out field experiments in greenhouses in different regions, it was determined that the strain ZF515 had a stable control effect against Cucumber Downy Mildew, with a control efficacy as high as 71.47%. The strain ZF515 was identified as Bacillus velezensis based on biological characteristics, physiological and biochemical characteristics, and multilocus sequence analysis. The strain ZF515 was assessed to have broad spectrum resistance to eight different pathogenic fungi by plate confrontation method. The above results showed that strain ZF515 has good biological potential against cucumber downy mildew and is a biocontrol strain with developmental value.

Key words: Bacillus velezensis, cucumber downy mildew, antagonistic bacterium, identification, control effect

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