Diversity of mycelial fungi in natural and human-affected Antarctic soils

Кочкина, Г. А.; Ivanushkina, N. E.; Лупачев, А. В.; Starodumova, Irina P.; Vasilenko, O. V.; Ozerskaya, S. M.

doi:10.1007/s00300-018-2398-y

Cited by 25 publications

(8 citation statements)

References 36 publications

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“…Previous studies on fungi diversity in the Antarctic Peninsula reported the presence of representatives of Pseudeurotium in soil, wood, and sponges, in addition to marine and lake sediments [41,60,61]. The following less abundant Ascomycota fungi (<5.0%) found in this study have already been reported in Antarctic environments: Tricladium, Oidiodendron, Herpotrichia, Acremonium, Penicillium, Talaromyces, Cladosporium, Sarocladium, and Thelebolus [41,46,[62][63][64][65][66][67][68]. However, it is worth highlighting that according to the literature, representatives of Passalora, Gibellulopsis, and Xylaria had have never been reported in this environment previously.…”

Section: Discussionsupporting

confidence: 71%

“…Even though anthropogenic influence on the abundance and diversity of fungal species at low temperatures is still scarce [65], some studies have indicated that anthropogenic action in the polar region can change the fungal species composition and lead to the propagation of eurytopic species at low temperature [71] including opportunistic pathogens and degraders [72]. In addition, many fungi associated with points near the glacier were mostly saprophytic, and the most distant points showed dominance of cosmopolitan fungi.…”

Section: Discussionmentioning

confidence: 99%

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Fungal Community in Antarctic Soil Along the Retreating Collins Glacier (Fildes Peninsula, King George Island)

2020

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Glacial retreat is one of the most conspicuous signs of warming in Antarctic regions. Glacier soils harbor an active microbial community of decomposers, and under the continuous retraction of glaciers, the soil starts to present a gradient of physical, chemical, and biological factors reflecting regional changes over time. Little is known about the biological nature of fungi in Antarctic glacier soils. In this sense, this work aimed at studying the behavior of fungal community structure from samples of glacier soil collected after glacial retreat (Collins Glacier). A total of 309 fungi distributed in 19 genera were obtained from eleven soil samples. Representatives of the genera Pseudogymnoascus (Ascomycota) and Mortierella (Mortierellomycota) were the most abundant isolates in all samples. The data revealed the presence of filamentous fungi belonging to the phylum Basidiomycota, rarely found in Antarctica. Analysis of the generalized linear models revealed that the distance from the glacier as well as phosphorus and clay were able to modify the distribution of fungal species. Environmental variations proved to have influenced the genera Pseudogymnoascus and Pseudeutorium.

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Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Fungal Community in Antarctic Soil Along the Retreating Collins Glacier (Fildes Peninsula, King George Island)

2020

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“…The sampling was carried in compliance with aseptic principles [7] when drilling special deep boreholes in various regions of the world: the Mackenzie River Delta (Canada), the Kolyma Lowland and Kamchatka (Russia), and the Myers and Taylor Dry Valleys in Antarctica, where the lowest rock temperatures on Earth are recorded. The isolation of fungi was carried out by inoculation on Czapek's medium (Cz) and malt extract agar (MEA), using different temperatures for thawing samples (20,35, and 52 • C) and cultivation (4 and 25 • C), and phenotypic and/or genotypic techniques were used for identification [8,9]. To control the sterility of air in the microbiological box, open Petri dishes with agar medium were exposed to the air for 10 min and then were incubated at 4 and 25 • C [8].…”

Section: Isolation Of Fungimentioning

confidence: 99%

“…Next in number are the classes Dothideomycetes and Leotiomycetes, which have a special position in the study of the Arctic and Antarctic. Among the representatives of these classes, fungi show the greatest diversity, with a high frequency of occurrence in low-temperature ecotopes [9]. There are markedly fewer members of the class Sordariomycetes, and the classes Pezizomycetes and Saccharomycetes are represented by one or two genera.…”

Section: Taxonomic Diversitymentioning

confidence: 99%

Collection of VKM Paleofungi

2021

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A unique collection of paleofungi from permafrost sediments, cryopegs, paleoseeds, and frozen volcanic ash from the Arctic and Antarctic, collected at different depths, was created in All-Russian Collection of Microorganisms (VKM). Some samples are as old as 3 million years. The collection includes psychrotolerant fungi, which have wide adaptive potential and are able to thrive in low-temperature habitats, and fungi that remain viable due to the presence of natural cryoprotectors that ensure the survival of fungal cells during low-temperature preservation in permafrost sediments. The collection contains 780 strains from 79 genera and more than 160 species and is maintained in accordance with international standards of microbial viability preservation and information support.

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“…Cold-adapted fungi from the genus Pseudogymnoascus are prevalent in most of the Antarctic environments (Ogaki et al, 2019; Rosa et al, 2019). To date, the species P. appendiculatus , P. destructans , P. pannorum , P. verrucosus , and P. vinaceous have been isolated from different Antarctic environments (Loque et al, 2010; Gomes et al, 2018; Alves et al, 2019; Kochkina et al, 2019; Rosa et al, 2019). Several studies have shown that extracts of these fungi produce bioactive metabolites with potential application, including antibacterial, antifungal, tripanocidal, herbicidal, and antitumoral activities (Furbino et al, 2014; Henríquez et al, 2014; Gonçalves et al, 2015; Gomes et al, 2018; Purić et al, 2018; Vieira et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Genetic Transformation of the Filamentous Fungus Pseudogymnoascus verrucosus of Antarctic Origin

et al. 2019

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Cold-adapted fungi isolated from Antarctica, in particular those belonging to the genus Pseudogymnoascus, are producers of secondary metabolites with interesting bioactive properties as well as enzymes with potential biotechnological applications. However, at genetic level, the study of these fungi has been hindered by the lack of suitable genetic tools such as transformation systems. In fungi, the availability of transformation systems is a key to address the functional analysis of genes related with the production of a particular metabolite or enzyme. To the best of our knowledge, the transformation of Pseudogymnoascus strains of Antarctic origin has not been achieved yet. In this work, we describe for the first time the successful transformation of a Pseudogymnoascus verrucosus strain of Antarctic origin, using two methodologies: the polyethylene glycol (PEG)-mediated transformation, and the electroporation of germinated conidia. We achieved transformation efficiencies of 15.87 ± 5.16 transformants per μg of DNA and 2.67 ± 1.15 transformants per μg of DNA for PEG-mediated transformation and electroporation of germinated conidia, respectively. These results indicate that PEG-mediated transformation is a very efficient method for the transformation of this Antarctic fungus. The genetic transformation of Pseudogymnoascus verrucosus described in this work represents the first example of transformation of a filamentous fungus of Antarctic origin.

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Diversity of mycelial fungi in natural and human-affected Antarctic soils

Cited by 25 publications

References 36 publications

Fungal Community in Antarctic Soil Along the Retreating Collins Glacier (Fildes Peninsula, King George Island)

Fungal Community in Antarctic Soil Along the Retreating Collins Glacier (Fildes Peninsula, King George Island)

Collection of VKM Paleofungi

Genetic Transformation of the Filamentous Fungus Pseudogymnoascus verrucosus of Antarctic Origin

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