Diversity and enzymatic, biosurfactant and phytotoxic activities of culturable Ascomycota fungi present in marine sediments obtained near the South Shetland Islands, maritime Antarctica.

Autor: da Silva MK; Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil., Barreto DLC; Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil., Vieira R; Instituto de Geociências, Universidade Federal Fluminense, Rio de Janeiro, RJ, Brazil., Neto AA; Instituto de Geociências, Universidade Federal Fluminense, Rio de Janeiro, RJ, Brazil., de Oliveira FS; Departamento de Geografia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil., 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; Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil., Duarte AWF; Complexo de Ciências Médicas E de Enfermagem, Universidade Federal de Alagoas, Campus Arapiraca, Arapiraca, AL, Brazil., Rosa LH; Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil. lhrosa@icb.ufmg.br.; 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 Mar 17; Vol. 28 (2), pp. 20. Date of Electronic Publication: 2024 Mar 17.
DOI: 10.1007/s00792-024-01336-4
Abstrakt: We studied the culturable fungal community recovered from deep marine sediments in the maritime Antarctic, and assessed their capabilities to produce exoenzymes, emulsifiers and metabolites with phytotoxic activity. Sixty-eight Ascomycota fungal isolates were recovered and identified. The most abundant taxon recovered was the yeast Meyerozyma guilliermondii, followed by the filamentous fungi Penicillium chrysogenum, P. cf. palitans, Pseudeurotium cf. bakeri, Thelebolus balaustiformis, Antarctomyces psychrotrophicus and Cladosporium sp. Diversity indices displayed low values overall, with the highest values obtained at shallow depth, decreasing to the deepest location sampled. Only M. guilliermondii and P. cf. palitans were detected in the sediments at all depths sampled, and were the most abundant taxa at all sample sites. The most abundant enzymes detected were proteases, followed by invertases, cellulases, lipases, carrageenases, agarases, pectinases and esterases. Four isolates showed good biosurfactant activity, particularly the endemic species A. psychrotrophicus. Twenty-four isolates of P. cf. palitans displayed strong phytotoxic activities against the models Lactuca sativa and Allium schoenoprasum. The cultivable fungi recovered demonstrated good biosynthetic activity in the production of hydrolytic exoenzymes, biosurfactant molecules and metabolites with phytotoxic activity, reinforcing the importance of documenting the taxonomic, ecological and biotechnological properties of fungi present in deep oceanic sediments of the Southern Ocean.
(© 2024. The Author(s), under exclusive licence to Springer Nature Japan KK, part of Springer Nature.)
Databáze: MEDLINE
Externí odkaz: