湖北农业科学 ›› 2018, Vol. 57 ›› Issue (24): 89-92.doi: 10.14088/j.cnki.issn0439-8114.2018.24.024

• 植物保护 • 上一篇    下一篇

山牵牛叶斑病拮抗细菌的分离筛选与鉴定

宋利沙, 蒋妮   

  1. 广西壮族自治区药用植物园,南宁 530023
  • 收稿日期:2018-06-29 出版日期:2018-12-25 发布日期:2020-04-01
  • 通讯作者: 蒋 妮(1979-),女,广西来宾人,副研究员,硕士,主要从事药用植物病虫害防治研究,(电子信箱)jiangni292@126.com。
  • 作者简介:宋利沙(1987-),女,河南淇县人,助理研究员,博士,主要从事药用植物病虫害防治研究,(电话)18587575152(电子信箱)lishasong@126.com
  • 基金资助:
    广西科技基地和人才专项(桂科AD16380013); 广西药用植物园青年科学基金项目(桂药基201801)

Isolation,Screening and Identification of Antagonistic Bacteria on Leaf Spot Disease of Thunbergia grandiflora

SONG Li-sha, JIANG Ni   

  1. Guangxi Botanica1 Garden of Medicinal Plants,Nanning 530023,China
  • Received:2018-06-29 Online:2018-12-25 Published:2020-04-01

摘要: 采用组织分离法从健康的山牵牛[Thunbergia grandiflora (Rottl. ex Willd.) Roxb.]叶片中分离到6株内生细菌;通过平板对峙试验,筛选出对山牵牛叶斑病病原菌及其他9种植物病原真菌均具有较强作用的2个菌株(bjq-a、bjq-d),其中内生细菌bjq-a的抑菌带宽度最大;通过形态鉴定并结合16S rDNA序列测定,对bjq-a、bjq-d菌株进行鉴定,分别为甲基营养型芽孢杆菌(Bacillus methylotrophicus)、解淀粉酶芽孢杆菌(Bacillus amyloliquefaciens);通过显微观察,bjq-a、bjq-d菌株均可造成山牵牛炭疽病病原菌菌丝膨大、畸形、断裂。

关键词: 山牵牛[Thunbergia grandiflora (Rottl. ex Willd.) Roxb.], 叶斑病, 拮抗细菌, 筛选, 鉴定

Abstract: Using the plate confrontation assay,2 strains(bjq-a, bjq-d) with antagonistic effects on leaf spot disease of Thunbergia grandiflora were screened from 6 bacteria isolated from health leaves of T. grandiflora conventional tissue separation,strain bjq-a was the biggest antagonism width. Antibacterial spectrum tests showed it had significantly antagonistic activities to 9 plant pathogens. Based on morphological and 16S rDNA sequence analysis, strains bjq-a and bjq-d were identified as Bacillus methylotrophicus and B. amyloliquefaciens,respectively. When observed under the microscope,the mycelia of Colletotrichum gloeosporioides showed swollen, deformity and breakage.

Key words: Thunbergia grandiflora, leaf spot disease, antagonistic bacteria, screening, identification

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