Diversity and Antiaflatoxigenic Activities of Culturable Filamentous Fungi from Deep-Sea Sediments of the South Atlantic Ocean
Open Access
- 11 February 2021
- journal article
- research article
- Published by Taylor & Francis Ltd in Mycobiology
- Vol. 49 (2), 151-160
- https://doi.org/10.1080/12298093.2020.1871175
Abstract
Despite recent studies, relatively few are known about the diversity of fungal communities in the deep Atlantic Ocean. In this study, we investigated the diversity of fungal communities in 15 different deep-sea sediments from the South Atlantic Ocean with a culture-dependent approach followed by phylogenetic analysis of ITS sequences. A total of 29 fungal strains were isolated from the 15 deep-sea sediments. These strains belong to four fungal genera, including Aspergillus, Cladosporium, Penicillium, and Alternaria. Penicillium, accounting for 44.8% of the total fungal isolates, was a dominant genus. The antiaflatoxigenic activity of these deep-sea fungal isolates was studied. Surprisingly, most of the strains showed moderate to strong antiaflatoxigenic activity. Four isolates, belonging to species of Penicillium polonicum, Penicillium chrysogenum, Aspergillus versicolor, and Cladosporium cladosporioides, could completely inhibit not only the mycelial growth of Aspergillus parasiticus mutant strain NFRI-95, but also the aflatoxin production. To our knowledge, this is the first report to investigate the antiaflatoxigenic activity of culturable deep-sea fungi. Our results provide new insights into the community composition of fungi in the deep South Atlantic Ocean. The high proportion of strains that displayed antiaflatoxigenic activity demonstrates that deep-sea fungi from the Atlantic Ocean are valuable resources for mining bioactive compounds.Keywords
Funding Information
- National Natural Science Foundation of China (31900088)
- COMRA Program (DY135-B2-17)
- Fundamental Research Funds for the Central Universities (HIT.NSRIF.2019073)
This publication has 54 references indexed in Scilit:
- Molecular evidence that deep‐branching fungi are major fungal components in deep‐sea methane cold‐seep sedimentsEnvironmental Microbiology, 2011
- Impact of mycotoxins on humans and animalsJournal of Saudi Chemical Society, 2011
- Biocontrol of Aspergillus flavus on peanut kernels by use of a strain of marine Bacillus megateriumInternational Journal of Food Microbiology, 2010
- Fungal diversity in oxygen-depleted regions of the Arabian Sea revealed by targeted environmental sequencing combined with cultivationFEMS Microbiology Ecology, 2010
- Fungal Diversity in Deep-Sea Hydrothermal EcosystemsApplied and Environmental Microbiology, 2009
- Iturin produced by Bacillus pumilus HY1 from Korean soybean sauce (kanjang) inhibits growth of aflatoxin producing fungiFood Control, 2009
- Yeast forms dominate fungal diversity in the deep oceansProceedings. Biological sciences, 2007
- Inhibition of Sporulation and Ultrastructural Alterations of Grapevine Downy Mildew by the Endophytic Fungus Alternaria alternataPhytopathology®, 2006
- Molecular evidence demonstrating the basidiomycetous fungus Cryptococcus curvatus is the dominant microbial eukaryote in sediment at the Kuroshima Knoll methane seepExtremophiles, 2005
- CLUSTAL W: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choiceNucleic Acids Research, 1994