野生甘草内生真菌的分离及其次级代谢产物活性研究
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(1.兰州理工大学生命科学与工程学院 甘肃省中藏药筛选评价及深加工重点实验室 兰州 730050;2.西北师范大学生命科学院 兰州 730060;3.甘肃省食品药品监督管理局审评认证中心 兰州 730070)

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贾志鹏(1996- ), 男,硕士生

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国家自然科学基金项目(31860004);甘肃省重点研发计划项目(20YF8FA106);甘肃省引导科.技创新发展专项资金(2019ZX -05);甘肃省中藏药筛选评价及深加工重点实验室开发项目(20180802 )


Isolation of Endophytic Fungi from Wild Licorice and the Activity of Its Secondary Metabolites
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(1.Key Laboratory of Herbal-Tibetan Drug Screening and Deep Processing of Gansu Province, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050;2.College of Life Sciences, Northwest Normal University, Lanzhou 730060;3.Food and Drug Administration Review and Certification Center of Gansu Province, Lanzhou 730070)

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    摘要:

    目的:分离野生甘草内生真菌并就其次生代谢产物的抑菌和抗氧化活性进行评价。方法:以新鲜野生甘草为材料,选取甘草不同组织部位,采用组织切块法,以9种培养基分离纯化其内生真菌并进行分子生物学鉴定;以纸片扩散法评价其代谢物对5种测试菌株的抑菌活性;以DPPH自由基和·OH清除能力评价代谢物的抗氧化活性。结果:从植物甘草中分离得到128株真菌,经分子生物学鉴定归属于5个不同的属。其中,YS-6发酵液样品对金黄色葡萄球菌显示一定的抑菌活性;GS-6a发酵液样品对DPPH自由基清除率达97.54 %,其菌丝体样品对·OH清除率达98.83%。结论:甘草内生真菌丰富多样,是筛选抗菌和抗氧化活性物质的良好来源。

    Abstract:

    Objective: In this study, endophytic fungi from wild Glycyrrhiza uralensis Fisch were isolated and the antibacterial and antioxidant activities of their secondary metabolites were evaluated. Method: Using fresh wild licorice as material, the different tissue parts of licorice were treated by tissue cutting method, and then the endophytic fungi were separated and purified with 9 different media and carry out molecular biological identification. The antimicrobial activities of their metabolites against five tested strains was evaluated by paper diffusion method. The antioxidant activity of the metabolites was evaluated by DPPH and ·OH radical scavenging capacity. Results: 128 strains of fungi were isolated from the plant licorice, which belonged to 5 different genera through molecular biology identification. YS-6 fermentation broth showed certain antibacterial activity against Staphylococcus aureus. The DPPH free radical scavenging rate of GS-6a fermentation broth was 97.54%, and the ·OH free radical scavenging rate of GS-6a mycelium was 98.83%. Conclusion: The resources of endophytic fungi isolated from licorice are abundant and diverse, which are good sources for screening antibacterial and antioxidant substances.

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贾志鹏,张新国,郭广君,魏亚茹,谢栋栋,范晓英,张继,黄丽娜,王邓拓,朱建宁.野生甘草内生真菌的分离及其次级代谢产物活性研究[J].中国食品学报,2022,22(5):320-331

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  • 收稿日期:2021-05-19
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  • 在线发布日期: 2022-06-15
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