Abstract—
The abundance and diversity of filamentous fungi in the bottom sediments of the Arctic Ocean seas (the Greenland, Barents, and Kara seas) were studied. Samples of the surface bottom sediments were collected during the 84th (July–August 2021) and 86th (October–November 2021) cruises of RV Akademik Mstislav Keldysh. The taxonomic affiliation of the isolated fungi was determined using polyphasic taxonomy. The isolated fungi belonged to 16 genera of different classes of ascomycetous, basidiomycetous, and zygomycetous fungi. The effect of cultivation temperature and different NaCl concentrations on fungal growth was determined, as well as the effect of cultivation conditions on the fatty acid profile for the strains capable of growth on media with increased osmotic potential. While fatty acid composition was shown to be affected by changes in environmental conditions, the response to osmotic stress differed among the studied cultures from deep-sea sediments.
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ACKNOWLEDGMENTS
The authors are grateful to T.V. Kolganova, Head of the “Bioengineering” Core Facility of the Research Center of Biotechnology, for invaluable assistance in establishing the molecular genetic diagnosis of the isolated fungi, as well as to the researchers and the crew of RV Akademik Mstislav Keldysh for the provided samples of bottom sediments.
Funding
This work was supported by the Ministry of Science and Higher Education of the Russian Federation, agreement no. 075-15-2021-1051. It was carried out according to State Assignments to the Pushchino Scientific Center for Biological Research and to the Federal Research Center of Biotechnology of the Russian Academy of Sciences.
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Kochkina, G.A., Pinchuk, I.P., Ivanushkina, N.E. et al. Fungi of the Arctic Seas. Microbiology 93, 282–292 (2024). https://doi.org/10.1134/S002626172360502X
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DOI: https://doi.org/10.1134/S002626172360502X