欢迎访问中国生物防治学报,今天是

中国生物防治学报 ›› 2017, Vol. 33 ›› Issue (5): 667-674.DOI: 10.16409/j.cnki.2095-039x.2017.05.013

• 研究论文 • 上一篇    下一篇

拮抗灰霉菌的海洋细菌甲基营养型芽胞杆菌的筛选、鉴定及其抑菌活性物质的研究

魏新燕1, 黄媛媛2, 黄亚丽2, 杜克久1   

  1. 1. 河北农业大学林学院, 保定 071001;
    2. 河北省科学院生物研究所, 石家庄 050051
  • 收稿日期:2017-06-08 出版日期:2017-10-08 发布日期:2017-10-11
  • 通讯作者: 黄亚丽, 杜克久
  • 作者简介:魏新燕,助理研究员,E-mail:bdweixinyan@163.com;黄亚丽,博士,研究员,E-mail:huangyali2291@163.com;杜克久,博士,教授,E-mail:dukejiu@126.com。
  • 基金资助:
    河北省应用基础研究计划重点基础研究项目(15962904D);国家重点研发计划课题(2016YFC0501303)。

Screening, Identification of Antagonistic Ocean Bacteria Bacillus methylotrophicus and Its Antimicrobial Substances to Botrytis cinerea pres.

WEI Xinyan1, HUANG Yuanyuan2, HUANG Yali2, DU Kejiu1   

  1. 1. College of Forestry, Hebei Agricultural University, Baoding 071001, China;
    2. Institute of Biology, Hebei Academy of Science, Shijiazhuang 050051, China
  • Received:2017-06-08 Online:2017-10-08 Published:2017-10-11

摘要: 采用ZoBell's 2216E培养基从65份渤海海水和底泥样品中分离到海洋细菌464株,通过平板对峙法获得了对灰霉菌具有较强拮抗作用的海洋细菌47株,其中菌株BH21的抑菌作用最强,抑菌带宽度为(11.8±0.3)mm;采用形态学、生理生化和分子生物学相结合的方法,将菌株BH21鉴定为甲基营养型芽胞杆菌Bacillus methylotrophicus,该菌具有较强耐盐、耐甲醇能力;通过排油圈法确定菌株BH21能够产生具有表面活性的代谢产物,随后以脂肽类物质相关基因的特异序列为引物进行菌株BH21抑菌活性成分相关基因的扩增,确定该菌株中含有ituA、ituB、ituC、ituD、fenD、srfAByndJ等7种脂肽物质的合成基因;利用盐酸沉淀和甲醇抽提法获得了BH21发酵液中脂肽粗提物,通过牛津杯法确定该脂肽粗提物具有明显抑制灰霉菌菌丝生长的能力,抑制率达到73.9%。

关键词: 海洋细菌, 灰霉菌, 甲基营养型芽胞杆菌, 脂肽类抗生物质, 拮抗菌

Abstract: 464 strains of ocean bacteria were isolated from 65 samples of sea water and sediment from Bohai using ZoBell's 2216E medium. Through plate confrontation method, 47 strains of marine bacteria with strong antagonism against Botrytis cinerea were obtained. Strain BH21 with high salt and methanol tolerance had the strongest antifungal effect and the inhibition zone diameter was 11.8 mm±0.3 mm. Strain BH21 was identified as Bacillus methylotrophicus by morphological, physiological, biochemical and molecular methods. Using the specific primers of lipopeptide gene, the related genes in strain BH21 were amplified and 7 lipopeptide antibiotics synthetic genes including ItuA, ituB, ituC, ituD, fend, srfAB and yndJ genes were identified in the strain. Crude extract of lipopeptide was obtained by the hydrochloric acid precipitation and methanol extraction. Oxford cup analysis demonstrated that the crude extract of lipopeptide could inhibit the mycelial growth of B. cinerea, with the inhibition rate of 73.9%.

Key words: Marine bacteria, Botrytis cinerea, Bacillus methylotrophicus, lipopeptide antifungal substance, antagonistic microbe

中图分类号: