生物技术通报 ›› 2019, Vol. 35 ›› Issue (9): 107-111.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0329

• 研究报告 • 上一篇    下一篇

黄芪根腐病生防芽孢杆菌的筛选鉴定与盆栽防效试验

赵晓霞, 牛世全, 文娜, 苏锋锋   

  1. 西北师范大学生命科学学院,兰州 730070
  • 收稿日期:2019-04-19 出版日期:2019-09-26 发布日期:2019-09-16
  • 作者简介:赵晓霞,女,硕士,研究方向:旱区微生物资源及微生物生态学;E-mail:465732455@qq.com
  • 基金资助:
    国家自然科学基金项目(31260134)

Screening and Identification of Biocontrol Bacillus sp. Against Astragalus Root Rot and Its Pot Experiment

ZHAO Xiao-xia, NIU Shi-quan, WEN Na, SU Feng-feng   

  1. College of Life Sciences,Northwest Normal University,Lanzhou 730070
  • Received:2019-04-19 Published:2019-09-26 Online:2019-09-16

摘要: 黄芪根腐病是严重影响黄芪产量的病害之一,为得到对黄芪根腐病病原菌具有较强拮抗作用的芽孢杆菌,以病原菌Fusarium solaniun KR997532为靶标菌株,对本实验室筛选保存的植物病原菌的拮抗芽孢杆菌进行初筛和复筛,得到了1株具有较强拮抗作用的菌种7-2-1-6,根据菌株7-2-1-6的16S rDNA序列分析结果,结合其培养形态特征和生理生化特性,将其鉴定为枯草芽孢杆菌亚种(Bacillus subtilis subsp. Spizizenii)。菌株7-2-1-6在盆栽试验中防治效果约为68.80%,对黄芪根腐病有较好的生防效果。

关键词: 黄芪根腐病, 生物防治, 枯草芽孢杆菌

Abstract: Astragalus root rot is one of the diseases that seriously affect the yield of astragalus. In order to obtain one bacillus strain with strong antagonistic activity against the pathogen of astragalus root rot,the pathogenic bacterium Fusarium solaniun KR997532 was used as the target strain,the antagonistic bacillus strains of the plant pathogens preserved in our laboratory were screened and rescreened,one bacillus strain 7-2-1-6 with strong antagonistic biological activity was obtained. Strain 7-2-1-6 was identified as Bacillus subtilis subsp. Spizizenii based on the 16S rDNA sequence analysis and the morphological characteristics and physiological and biochemical characteristics of strain 7-2-1-6. The bio-control effect of strain 7-2-1-6 achieved about 68.80% to astragalus root rot in pot experiment.

Key words: Astragalus membranaceus root rot, biological control, Bacillus subtilis