生物技术通报 ›› 2015, Vol. 31 ›› Issue (10): 165-170.doi: 10.13560/j.cnki.biotech.bull.1985.2015.10.026

• 研究报告 • 上一篇    下一篇

柴胡内生真菌鉴定与抑菌活性筛选

李玲玲,罗合春,张先淑   

  1. 重庆工贸职业技术学院生物化学工程系, 重庆 408000
  • 收稿日期:2014-12-22 出版日期:2015-10-28 发布日期:2015-10-28
  • 作者简介:李玲玲, 女, 硕士, 研究方向:微生物制药; E-mail:729005755@qq.com
  • 基金资助:
    重庆工贸职业技术学院院级项目(ZR201310)

Identification of Endophytic Fungi in Bupleurum and Screening of Antimicrobial Activities

Li Lingling, Luo Hechun, Zhang Xianshu   

  1. Biochemistry Engineering Department, Chongqing Industry & Trade Polytechnic, Chongqing 408000
  • Received:2014-12-22 Published:2015-10-28 Online:2015-10-28

摘要: 从野生柴胡中分离内生真菌, 旨在寻找具广谱抗菌活性的内生真菌。对采自四川省甘孜藏族自治州的一株健康野生柴胡中的内生真菌进行分离, 以枯草芽孢杆菌(Bacillus subtilis)、大肠埃希菌(Escherichia coli)和金黄色葡萄球菌(Staphylococcus aureus)为指示菌, 对分离到的内生真菌分别利用琼脂块法和双层平板法法进行抑菌活性的初筛和复筛。从其根、茎、叶中共分离出27株内生真菌, 经分类鉴定, 隶属于9个属, 其中青霉属(Penicillium)和曲霉属(Aspergillus)为优势属。26株内生真菌对两种或3种指示菌均具有一定的抑菌活性, 占分离菌株总数的96.30%, 其中5株(CHG-01、CHG-04、GHJ-10、CHY-01和CHY-03)对3种指示菌均有较强抑菌活性。柴胡内生真菌的次级代谢产物中存在着天然抑菌活性物质, 可为寻找新型抗菌物质提供资源。

关键词: 内生真菌, 抑菌活性, 柴胡

Abstract: In order to determine the main distribution of endophytes and their broad-spectrum antimicrobial activity, 27 strains of endophytic fungi were isolated from the stems, roots and leaves of wild bupleurum at the Ganzi Tibetan Autonomous Prefecture of Sichuan Province. Identification of these strains was determined by their morphological features. They were classified as 9 fungal genera in which Aspergillus and Penicillium were the dominant. The antimicrobial activities from endophytic fungi were investigated by using the agar diffusion method and the cylinder plate method, and Bacillus subtilis, Escherichia coli and Staphylococcus aureus as indicator microorganisms. The results showed that 26 strains, accounting for 96.30% of all the isolates, had antimicrobial activities to 2 indicators or 3. Endophytic fungi of CHG-01, CHG-04, CHJ-10, CHY-01, and CHY-03 had remarkable antimicrobial activities to 3 indicators respectively. There is natural antimicrobial substance in the secondary metabolites of endophytic fungi from the wild bupleurum, which provides a new source for searching novel antimicrobial products.

Key words: endophytic fungi, antimicrobial activity, bupleurum