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The First Discovery of Alkali-Resistant Fungi on the Coast of Chloride Lake Baskunchak

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Abstract—

This is the first study of alkali-resistant fungi under the conditions of neutral salinization at Lake Baskunchak (Astrakhan region, Russia). Fungi were isolated from the lake coast chloride soils on alkaline agar medium (pH 10.0–10.5); isolates were characterized by morphological, cultural and molecular genetic features; phylogenetic analysis and analysis of adaptation to pH and salinity were performed. It has been shown that alkali-resistant fungi at the lake coast is a polyphyletic group of ascomycetes from Sordariomycetes (nine species), Dothideomycetes (five species), Eurotiomycetes (three species), and also sterile mycelium (15 isolates). The study of the growth rates in a wide range of pH values has shown that there are both alkalotolerant and alkaliphilic fungi among the isolates. The tolerance of isolates to elevated concentrations of sodium chloride was confirmed. The discovery of obligate alkaliphiles under conditions of neutral salinization was unexpected. Obligate alkaliphilic isolates were characterized as a new species of the genus Sodiomyces as a result of phylogenetic reconstructions. In the article, we discuss the possible ecological role of alkali-resistant fungi in saline habitats.

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Funding

This study was supported by the Russian Foundation for Basic Research (project no. 18-34-00779 mol_a).

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Authors and Affiliations

  1. Department of Mycology and Algology, Faculty of Biology, Moscow State University, 119234, Moscow, Russia

    S. A. Bondarenko, M. L. Georgieva, L. Yu. Kokaeva & E. N. Bilanenko

  2. Federal Research Center Fundamentals of Biotechnology, Russian Academy of Sciences, 119071, Moscow, Russia

    S. A. Bondarenko

  3. Gause Institute of New Antibiotics, 119021, Moscow, Russia

    M. L. Georgieva

Authors
  1. S. A. Bondarenko
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  2. M. L. Georgieva
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  3. L. Yu. Kokaeva
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  4. E. N. Bilanenko
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Corresponding author

Correspondence to S. A. Bondarenko.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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The authors declare that they have no conflict of interest.

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Translated by V. Mittova

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Bondarenko, S.A., Georgieva, M.L., Kokaeva, L.Y. et al. The First Discovery of Alkali-Resistant Fungi on the Coast of Chloride Lake Baskunchak. Moscow Univ. Biol.Sci. Bull. 74, 57–62 (2019). https://doi.org/10.3103/S0096392519020020

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  • DOI: https://doi.org/10.3103/S0096392519020020

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