Abstract
This study aimed at investigating the diversity of endophytic fungi from Coptis chinensis and their activity against methicillin-resistant Staphylococcus aureus (MRSA). Seventy-nine fungal isolates obtained from C. chinensis were identified to belong to 27 species based on morphological features and internal transcript spacer (ITS) gene sequencing analysis. Comparing relative frequency values, the most frequent genera were Colletotrichum and Fusarium, while most frequent species were C. gloeosporioides and F. avenaceum. Analysis of diversity indices indicated that C. chinensis harbored abundant fungal resources. Methanol extracts of fungal endophyte cultures were evaluated for antibacterial activity against S. aureus ATCC 25923 and two other MRSA clinical strains. Nine of 27 endophytic fungi exhibited inhibitory activities against S. aureus ATCC 25923. Among them, Paraboeremia litseae HL-17, Fusarium sp. HL-23, and Fusarium sp. HL-27 exhibited obvious inhibition against the three S. aureus strains. Our findings suggest that the endophytic fungi in C. chinensis have a high diversity and an obvious tissue specificity, and could be of potential interest in screening anti-MRSA agents. To the best of our knowledge, this is the first report on the diversity and anti-MRSA activity of fungal endophytes from C. chinensis.
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Acknowledgements
We are thankful to professor Hao Zeng for providing S. aureus strains used in this study.
Funding
This work was financially supported by Chongqing Municipal Natural Science Foundation (cstc2020jcyj-msxmX0059) and the Outstanding Youth Foundation of Army Medical University.
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Ming, Q., Huang, X., Guo, L. et al. Diversity of endophytic fungi in Coptis chinensis Franch. and their activity against methicillin-resistant Staphylococcus aureus. Folia Microbiol 67, 965–974 (2022). https://doi.org/10.1007/s12223-022-00994-1
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DOI: https://doi.org/10.1007/s12223-022-00994-1