Enzymes and biosurfactants of industrial interest produced by culturable fungi present in sediments of Boeckella Lake, Hope Bay, north-east Antarctic Peninsula.

Autor: Teixeira EAA; Laboratório de Microbiologia Polar E Conexões Tropicais, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil., de Souza LMD; Laboratório de Microbiologia Polar E Conexões Tropicais, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil., Vieira R; Departamento de Geografia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil., Lirio JM; Instituto Antártico Argentino, Buenos Aires, Argentina., Coria SH; Instituto Antártico Argentino, Buenos Aires, Argentina., Convey P; British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge, CB3 0ET, UK.; Department of Zoology, University of Johannesburg, Auckland Park, 2006, South Africa.; Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Las Palmeras 3425, Santiago, Chile.; Cape Horn International Center (CHIC), Puerto Williams, Chile., Rosa CA; Laboratório de Microbiologia Polar E Conexões Tropicais, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil., Rosa LH; Laboratório de Microbiologia Polar E Conexões Tropicais, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil. lhrosa@icb.ufmg.br.
Jazyk: angličtina
Zdroj: Extremophiles : life under extreme conditions [Extremophiles] 2024 Jun 22; Vol. 28 (2), pp. 30. Date of Electronic Publication: 2024 Jun 22.
DOI: 10.1007/s00792-024-01345-3
Abstrakt: This study characterized cultivable fungi present in sediments obtained from Boeckella Lake, Hope Bay, in the north-east of the Antarctic Peninsula, and evaluated their production of enzymes and biosurfactants of potential industrial interest. A total of 116 fungal isolates were obtained, which were classified into 16 genera within the phyla Ascomycota, Basidiomycota and Mortierellomycota, in rank. The most abundant genera of filamentous fungi included Pseudogymnoascus, Pseudeurotium and Antarctomyces; for yeasts, Thelebolales and Naganishia taxa were dominant. Overall, the lake sediments exhibited high fungal diversity and moderate richness and dominance. The enzymes esterase, cellulase and protease were the most abundantly produced by these fungi. Ramgea cf. ozimecii, Holtermanniella wattica, Leucosporidium creatinivorum, Leucosporidium sp., Mrakia blollopis, Naganishia sp. and Phenoliferia sp. displayed enzymatic index > 2. Fourteen isolates of filamentous fungi demonstrated an Emulsification Index 24% (EI 24% ) ≥ 50%; among them, three isolates of A. psychrotrophicus showed an EI 24%  > 80%. Boeckella Lake itself is in the process of drying out due to the impact of regional climate change, and may be lost completely in approaching decades, therefore hosts a threatened community of cultivable fungi that produce important biomolecules with potential application in biotechnological processes.
(© 2024. The Author(s), under exclusive licence to Springer Nature Japan KK.)
Databáze: MEDLINE
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