天然产物研究与开发 ›› 2021, Vol. 33 ›› Issue (增刊1): 35-42.doi: 10.16333/j.1001-6880.2021.S.005

• 研究论文 • 上一篇    下一篇

内生真菌稻帚枝霉Sarocladium oryzae L99次级代谢产物分离及抑菌活性

梁伟中1,肖依文1,2,张文慧1,汪涯1,高波良1,朱笃1,2*   

  1. 1江西科技师范大学生命科学学院 江西省生物加工过程重点实验室,南昌 330013;2江西师范大学生命科学学院 江西省亚热带植物资源保护与利用重点实验室,南昌 330022

  • 出版日期:2021-08-28 发布日期:2021-09-08
  • 基金资助:
    国家自然科学基金(81760649);江西省自然科学基金(20181BAB215044);江西省教育厅科技计划研究项目(GJJ190593);江西科技师范大学研究生创新基金(YC2019-X03)

Isolation of secondary metabolites and antimicrobial activity of endophytic fungus Sarocladium oryzae L99

LIANG Wei-zhong1,XIAO Yi-wen1,2,ZHANG Wen-hui1,WANG Ya1,GAO Bo-liang1,ZHU Du1,2 *   

  1. 1Key Laboratory of Bioprocess Engineering of Jiangxi Province,College of Life Sciences,Jiangxi Science and Technology Normal University,Nanchang 330013,China;2Key Laboratory of Protection and Utilization of Subtropical Plant Resources of Jiangxi Province,College of Life Sciences,Jiangxi Normal University,Nanchang 330022,China


  • Online:2021-08-28 Published:2021-09-08

摘要:

东乡野生稻(Oryza rufipogon Griff.)内生真菌L99显示出较强的病原细菌和真菌抑制活性。结合形态学与ITS-rDNA序列分析,将L99进行鉴定为稻帚枝霉(Sarocladium oryzae)。对菌株L99发酵产物进行分离,共得到10个化合物,利用核磁共振和质谱技术将其鉴定为脱氧胸腺嘧啶核苷(1)、2′-O-甲基腺苷(2)、2′-脱氧尿苷(3)、脲嘧啶核苷(4)、腺嘌呤核苷(5)、(E)-9-methyloctadec-9-enoic acid(6)、麦角甾醇过氧化物(7)、烟曲霉酸(8)、(9Z)-glycerin-1-monooleate(9)、酞酸二丁酯(10)。除化合物8外,其他化合物均首次从稻帚枝霉中分离得到。抑菌活性结果表明,化合物6810对大肠杆菌、金黄色葡萄球菌和水稻细菌性条斑病菌有较强的抑制活性,而化合物69具有水稻纹枯病菌抑制活性。

关键词: 东乡野生稻, 内生真菌, 稻帚枝霉, 次级代谢产物, 抑菌活性

Abstract:

An endophytic fungus strain L99 from Dongxiang wild rice (Oryza rufipogon Griff.) showed strong inhibitory activity against pathogenic bacteria and fungus.By using morphological characteristics and internal transcribed spacer (ITS) sequence analysis,strain L99 was identified as Sarocladium oryzae.Ten kinds of secondary compounds were separated and purified from fermentation broth of strain L99.According to mass spectrometry,1H NMR and 13C NMR analyses,they were identified as deoxythymidine (1),2′-O-methyladenosine(2) ,2′-deoxyuridine (3),uridine (4),adenosine (5),(E)-9-methyloctadec-9-enoic acid (6),ergosterol peroxide (7),fumonic acid (8),(9Z)-glycerin-1-monooleate (9),and dibutyl phthalate (10).Except for compound 8,the other 9 compounds were isolated from S. oryzae for the first time.The antimicrobial activities were screened,compounds 6,8 and 10 showed certain inhibitory activity against Escherichia coli,Staphylococcus aureus and Xanthomonas oryzae pv. oryzicola,while compound 6 and 9 showed inhibitory activity against Rhizoctonia solani.

Key words: Oryza rufipogon, endophytic fungus, Sarocladium oryzae, secondary metabolites, antimicrobial activity

中图分类号:  O629.9