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http://dx.doi.org/10.1080/12298093.2020.1871175

Diversity and Antiaflatoxigenic Activities of Culturable Filamentous Fungi from Deep-Sea Sediments of the South Atlantic Ocean  

Zhou, Ying (School of Marine Science and Technology, Harbin Institute of Technology)
Gao, Xiujun (School of Marine Science and Technology, Harbin Institute of Technology)
Shi, Cuijuan (School of Marine Science and Technology, Harbin Institute of Technology)
Li, Mengying (School of Marine Science and Technology, Harbin Institute of Technology)
Jia, Wenwen (School of Marine Science and Technology, Harbin Institute of Technology)
Shao, Zongze (China Key Laboratory of Marine Genetic Resources, The Third Institute of Oceanography, Ministry of Natural Resources)
Yan, Peisheng (School of Marine Science and Technology, Harbin Institute of Technology)
Publication Information
Mycobiology / v.49, no.2, 2021 , pp. 151-160 More about this Journal
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
Diversity; deep-sea sediments; culturable fungi; antiaflatoxigenic activity; Atlantic;
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