Microscopic fungi of lithobiont communities of Argentine Islands Region : Data from the 22nd Ukrainian Antarctic expedition

• Published in: Acta Botanica Hungarica
• Main Authors: Kondratiuk, Tetyana, Beregova, Tetiana, Parnikoza, Ivan, Kondratyuk, Sergej, Thell, Arne
• Format: Article in Journal/Newspaper
• Language: English
• Published: Akademiai Kiado 2020
• Subjects: Microbiology; Botany; Argentine Islands; lithobiont communities; microscopic fungi; species diversity; Antarctic; Argentine; Antarc*; Antarctica
• Online Access: https://lup.lub.lu.se/record/ba0ad498-d5ca-4b98-897b-fa330152421b; https://doi.org/10.1556/034.62.2020.1-2.5

The identification of the diversity of microscopic fungi of lithobiont communities of the Argentine Islands in specimens collected during the 22nd Ukrainian Antarctic Expedition was the purpose of this work. Samples of rock, soil, mosses and lichens of rock micro-habitats of “Crustose lichen sub-formation and fruticose lichen and moss cushion sub-formation” were used in the work. These samples were used for extracting and cultivation of filamentous fungi on dense nutrient media. Determination of physiological and biochemical characteristics and identification of yeast-like fungi were performed using a microbiological analyser ‘Vitek-2’ (‘Bio Merieux’, France). Cultivation of microorganisms was carried out at temperaturesfrom +2 to +37 °C. In results cultures of microscopic fungi of Zygomycota (Mucor circinelloides), Ascomycota (species of the genera cf. Thelebolus, Talaromyces), representatives of the Anamorphic fungi group (Geomyces pannorum, species of the genera Alternaria, Acremonium, Aspergillus, Penicillium, and Cladosporium) were isolated from Antarctic samples. Microscopic fungi Penicillium spp. were dominated after the frequency in the studied samples (54.5%). Rhodotorula rubra and Candida sp. among isolated yeast fungi, and dark pigmented fungi represented by Aureobasidium pullulans and Exophiala spp. were identified. The biological properties of a number of isolated fungi (the potential ability to synthesise important biologically active substances: melanins, carotenoids, lipids) are characterised. Mycobiotaof rock communities of Argentine Islands is rich on filamentous and yeast fungi similarly to other regions of Antarctica. A number of fungi investigated are potentially able to synthesise biologically active substances. The dark pigmented species of the genera Cladosporium, Exophiala, Aureobasidium pullulans, capable of melanin synthesis; ‘red’ yeast Rhodotorula rubra (carotenoid producers and resistant to toxic metals); Mucor circinelloides and Geomyces pannorum, lipid producers, are among these ...