Unveiling resistome profiles in the sediments of an Antarctic volcanic island

Autor(es)

Centurion, V. B. ; Delforno, T. P. ; Lacerda-Junior, G. V. ; Duarte, A. W. F. ; Silva, U. ; Bellini, G. B. ; Rosa, L. H. ; Oliveira, V. M.

• Tipo de documento: Artigo Científico
• Fonte: Environmental Pollution; v. 255, p. 12-pg., 2019-12-01.

Resumo

The Deception Island, located in Maritime Antarctica, is a volcanic island with geothermal activity and one of the most visited by tourists. However, the extent of the anthropogenic impact remains largely unknown and the factors shaping the resistance/tolerance mechanisms in the microbiomes from Whalers Bay ecosystems have never been investigated. In this context, this study aimed to reveal the resistome profiles of Whalers Bay sediments and correlate them with environmental factors. Samples were collected at four sites during the summer 2014/2015 along a transect of 27.5 m in the Whalers Bay sediments. DNA isolated from sediment samples was sequenced using the Illumina HiSeq platform. Bioinformatic analyses allowed the assembly of contigs and scaffolds, prediction of ORFs, and taxonomic and functional annotation using NCBI RefSeq database and KEGG orthology, respectively. Microorganisms belonging to the genera Psychrobacter, Flavobacterium and Polaromonas were shown to dominate all sites, representing 60% of taxonomic annotation. Arsenic (As), copper (Cu) and iron (Fe) were the most abundant metal resistance/tolerance types found in the microbiomes. Beta-lactam was the most common class related to antibiotics resistance/tolerance, corroborating with previous environmental resistome studies. The acridine class was the most abundant amongst the biocide resistance/tolerances, related to antiseptic compounds. Results gathered in this study reveal a repertoire of resistance/tolerance classes to antibiotics and biocides unusually found in Antarctica. However, given the volcanic nature (heavy metals-rich region) of Deception Island soils, this putative impact must be viewed with caution. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 16/05640-6 - Multi-ômicas aplicadas ao conhecimento e exploração de microbiomas Antárticos
• Beneficiário: Valeria Maia Merzel
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/03172-8 - Mecanismos de adaptação ao estresse em microbioma de sedimentos da Ilha Vulcânica Deception na Antártica marítima
• Beneficiário: Victor Borin Centurion Biruel
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto