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中国生物防治学报 ›› 2024, Vol. 40 ›› Issue (3): 717-726.DOI: 10.16409/j.cnki.2095-039x.2024.02.026

• 研究论文 • 上一篇    

十字花科根肿病拮抗菌贝莱斯芽胞杆菌ZF72分离鉴定及生防效果研究

林子涵1,2, 张思雨1, 康华军1, 袁晓伟3, 李兴盛3, 石延霞1, 谢学文1, 李磊1, 范腾飞1, 李宝聚1, 柴阿丽1   

  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. 中国农业大学园艺学院, 北京 100193;
    3. 山东省华盛农业集团股份有限公司, 青州 262500
  • 收稿日期:2023-10-27 发布日期:2024-06-07
  • 通讯作者: 柴阿丽,E-mail:chaiali@caas.cn;李宝聚,E-mail:libaojuivf@163.com。
  • 作者简介:林子涵,E-mail:15528289165@163.com;张思雨,E-mail:siyuzh163@163.com

Identification and Biocontrol Effect of Bacillus velezensis ZF72 against Clubroot disease of Crucifers

LIN Zihan1,2, ZHANG Siyu1, KANG Huajun1, YUAN Xiaowei3, LI Xingsheng3, SHI Yanxia1, XIE Xuewen1, LI Lei1, FAN Tengfei1, LI Baoju1, CHAI Ali1   

  1. 1. Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, State Key Laboratory of Vegetable Biobreeding, Beijing 100081, China;
    2. College of Horticulture, China Agricultural University, Beijing 100193, China;
    3. Shandong Huasheng Agriculture Limited Company, Qingzhou 262500, China
  • Received:2023-10-27 Published:2024-06-07
  • Contact: 国家重点研发计划(2022YFD1401200);中国农业科学院科技创新工程(CAAS-ASTIP-IVFCAAS);大宗蔬菜产业技术体系(CARS-25)
  • Supported by:
    10.16409/j.cnki.2095-039x.2024.02.026

摘要: 针对十字花科根肿病日益严重且防治困难的问题,采用平板对峙法,以尖孢镰孢菌Fusarium oxysporum和辣椒疫霉菌Phytophthora capsici为指示菌进行初筛,通过盆栽试验复筛,得到十字花科根肿病高效生防菌株ZF72,盆栽防效74.6%。根据形态学特征、生理生化特性及16S rDNA,gyrBatpD多基因系统发育分析,鉴定菌株ZF72为贝莱斯芽胞杆菌Bacillus velezensis。采用单因素试验对菌株ZF72摇瓶发酵工艺进行优化,确定最佳配方为山梨醇3 g/L、麸皮8 g/L、CaCl21 g/L和MgCl2·6H2O 3 g/L,最适发酵条件为温度28 ℃、pH 6.0、装液量50 mL/250 mL、转速240 r/min、种子液接种量1%(v/v)。田间试验结果显示,菌株ZF72处理根肿病症状明显减轻,田间防效可达63.8%,为根肿病生物防治提供了新的微生物资源。

关键词: 十字花科根肿病, 贝莱斯芽孢杆菌, 生物防治

Abstract: Clubroot disease of cruciferous plants caused by Plasmodiophora brassicae Woronin occurred severely and was difficult to control. In this study, a biocontrol agent ZF72 was screened by using dual-culture assay against Fusarium oxysporum and Phytophthora capsica. Control efficacy of ZF72 against clubroot disease in pot experiment was 74.6%. The strain ZF72 was identified as Bacillus velezensis based on morphological characteristics, physiological and biochemical analysis, as well as 16S rDNA, gyrBand atpDphylogenetic analysis. The fermentation of strain ZF72 was optimized by single factor test. An optimum medium composition was as followings: sorbitol 3 g/L, bran 8 g/L, CaCl2 1 g/L, and MgCl2·6H2O 3 g/L. The optimum fermentation conditions were as followings: temperature 28℃, pH 6.0, loading volume 50 mL/250 mL, rotating speed 180 r/min, and inoculation amount 1% (v/v). Treatment with strain ZF72 significantly reduced the incidence of clubroot disease of Chinese cabbage, with a control efficacy of 63.8% in field experiment, which provides new microbial resources for biological control of clubroot disease of crucifers.

Key words: clubroot of crucifers, Bacillus velezensis, biocontrol

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