Current Biotechnology ›› 2025, Vol. 15 ›› Issue (6): 1040-1049.DOI: 10.19586/j.2095-2341.2025.0072

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Solid-state Fermentation of Marine Fungus Meira nashicola ZJ353 and the Isolation and Identification of its Metabolites

Jingwen CAO1(), Yanchun BAO1, Yuanchao MAO1, Xinyuan YANG1, Haidong CUI2, Xiyan HOU1, Liming JIN1()   

  1. 1.Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education,Dalian Minzu University,Liaoning Dalian 116600,China
    2.Qingdao ValueValue Medical Biomaterial Co. ,Ltd. ,Shandong Qingdao 266109,China
  • Received:2025-06-30 Accepted:2025-08-21 Online:2025-11-25 Published:2026-01-04
  • Contact: Liming JIN

Abstract:

In recent years, the development of new antibiotics from the ocean has become a research hotspot. Using 21 fungi strains isolated from arctic sea mud as the research objects, three strains of fungi with inhibitory effects on Staphylococcus aureus were screened out by the agar diffusion method, among which the strain numbered ZJ353 exhibited the best antibacterial activity. Through morphological identification and 26S rDNA species identification, it was named Meira nashicola ZJ353. The solid-state fermentation conditions were optimized, and the metabolites were isolated and identified to determine the optimal fermentation conditions: rice medium, initial water addition of the medium at 90%, fermentation time of 11 days, and fermentation temperature of 30 ℃. Then, the M. nashicola ZJ353 was expanded for cultivation, and its fermentation products were extracted by ultrasonic treatment with ethyl acetate, a compound monomer was isolated through column chromatography on silica gel and HPLC. Using infrared spectroscopy, precise mass time-of-flight liquid chromatography-mass spectrometry, 1H NMR and 13C NMR spectra, the structure of the compound was analyzed, and the molecular formula of the compound was determined to be C16H22O4. The results provides a certain theoretical basis for the development of antibacterial substances from marine microorganisms.

Key words: marine fungi, fermentation conditions optimization, metabolic products, separation, identification

摘要:

从海洋中开发新型抗生素已成为近年的研究热点。以分离自北冰洋海泥中的21株真菌菌株为研究对象,通过琼脂扩散法筛选对金黄色葡萄球菌具有抑制作用的3株真菌,发现编号ZJ353的菌株抗菌活性最佳。经过形态学鉴定和26S rDNA菌种鉴定,命名为Meira nashicola ZJ353。对其固态发酵条件进行优化,并对代谢产物进行分离鉴定,确定了最佳发酵条件:大米培养基、培养基初始加水量为90%、发酵时间为11 d、发酵温度为30 ℃。对M. nashicola ZJ353进行扩大培养,乙酸乙酯超声浸提其发酵产物,通过硅胶柱层析和高效液相色谱分离出一个化合物单体。结合红外光谱、精确质量飞行时间质谱液质联用技术、1H NMR和13C NMR对化合物的结构进行分析,鉴定出化合物的分子式为C16H22O4。研究结果为海洋微生物源抗菌物质开发提供了一定的理论基础。

关键词: 海洋真菌, 发酵条件优化, 代谢产物, 分离, 鉴定

CLC Number: