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中国生物防治学报 ›› 2022, Vol. 38 ›› Issue (3): 681-688.DOI: 10.16409/j.cnki.2095-039x.2022.02.021

• 研究论文 • 上一篇    

关防风立枯病病原菌根际拮抗细菌筛选与鉴定

陈逢玲, 于航, 常丽娜, 孙卓, 林红梅, 杨利民   

  1. 吉林农业大学中药材学院/省部共建生态恢复与生态系统管理国家重点实验室, 长春 130118
  • 收稿日期:2021-10-12 发布日期:2022-06-20
  • 通讯作者: 孙卓,博士,讲师,E-mail:329575068@163.com;林红梅,博士,副教授,E-mail:baolinhm@126.com。
  • 作者简介:陈逢玲,女,硕士研究生,E-mail:1297500645@qq.com
  • 基金资助:
    国家重点研发计划项目(2019YFC1710700);财政部和农业农村部国家现代农业产业技术体系资助(CARS-21);吉林省科技发展计划项目(20200402104NC、20200404010YY、20210204011YY)

Screening and Identification of the Antagonistic Bacteria against Saposhnikovia divaricata Seedling Damping-off

CHEN Fengling, YU Hang, CHANG Lina, SUN Zhuo, LIN Hongmei, YANG Limin   

  1. Breeding Base of State Key Laboratory of JLP-MOST for Ecological Restoraton and Ecosystem Management/College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China
  • Received:2021-10-12 Published:2022-06-20

摘要: 为筛选出对立枯丝核菌Rhizoctonia solani Kühn具有优良防效的拮抗菌株。本研究从关防风根际土壤中分离纯化出156株细菌,采用平板对峙法测定菌株SC-32和SC-127对立枯丝核菌均有良好拮抗效果,且兼具广谱抑菌能力;抗生素标记法测定菌株SC-32和SC-127接种35 d后在土壤中含菌量仍能保持2.93×107和7.83×106CFU/g;通过盆栽试验研究结果表明,菌株SC-32和SC-127对关防风立枯病的防治效果为60.53%和65.89%,高于菌剂和农药处理。通过形态学、生理生化特征、16S rDNA基因序列进行分类学鉴定确定菌株SC-32和SC-127均为贝莱斯芽胞杆菌Bacillus velezensis

关键词: 关防风立枯病, 拮抗细菌, 筛选, 定殖, 防病

Abstract: This study aims to discover antagonistic strains with good control effect against Rhizoctonia solani. 156 bacterial strains were identified and purified from Saposhnikovia divaricata rhizosphere soil, and both strains SC-32 and SC-127 exhibited good antagonistic effects against R. solani by plate antagonism technique, as well as broad-spectrum antibacterial capacity. 35 days post antibiotic labeling inoculation, the quantities of SC-32 and SC-127 remained 2.93×107 and 7.83×106CFU/g in soil, respectively. Pot experiment revealed that SC-32 and SC-127 had 60.53% and 65.89% control efficacies on S. divaricata seedling damping-off, respectively, which were greater than thiophanate-methyl, Trichoderma harzianum, and Bacillus subtilis. Based on analyses of morphological, physiological, and biochemical properties, as well as the 16S rDNA gene sequence, the strains SC-32 and SC-127 were identified as Bacillus velezensis.

Key words: Saposhnikovia divaricata seedling damping-off, antagonistic bacterium, screening, colonization, control effect

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