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First Insights into the Microbiology of Three Antarctic Briny Systems of the Northern Victoria Land

1
Institute of Polar Sciences, National Research Council (CNR-ISP), Spianata San Raineri 86, 98122 Messina, Italy
2
Stazione Zoologica Anton Dohrn, Department BIOTECH, National Institute of Biology, Villa Pace, Contrada Porticatello 29, 98167 Messina, Italy
3
Dipartimento di Scienze Teoriche e Applicate, University of Insubria, Via J.H. Dunant 3, 21100 Varese, Italy
*
Author to whom correspondence should be addressed.
Equal contribution as first author.
Equal contribution as last author.
Academic Editor: Michael Wink
Diversity 2021, 13(7), 323; https://doi.org/10.3390/d13070323
Received: 22 June 2021 / Revised: 11 July 2021 / Accepted: 11 July 2021 / Published: 15 July 2021
(This article belongs to the Special Issue 2021 Feature Papers by Diversity’s Editorial Board Members)
Different polar environments (lakes and glaciers), also in Antarctica, encapsulate brine pools characterized by a unique combination of extreme conditions, mainly in terms of high salinity and low temperature. Since 2014, we have been focusing our attention on the microbiology of brine pockets from three lakes in the Northern Victoria Land (NVL), lying in the Tarn Flat (TF) and Boulder Clay (BC) areas. The microbial communities have been analyzed for community structure by next generation sequencing, extracellular enzyme activities, metabolic potentials, and microbial abundances. In this study, we aim at reconsidering all available data to analyze the influence exerted by environmental parameters on the community composition and activities. Additionally, the prediction of metabolic functions was attempted by the phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt2) tool, highlighting that prokaryotic communities were presumably involved in methane metabolism, aromatic compound biodegradation, and organic compound (proteins, polysaccharides, and phosphates) decomposition. The analyzed cryoenvironments were different in terms of prokaryotic diversity, abundance, and retrieved metabolic pathways. By the analysis of DNA sequences, common operational taxonomic units ranged from 2.2% to 22.0%. The bacterial community was dominated by Bacteroidetes. In both BC and TF brines, sequences of the most thermally tolerant and methanogenic Archaea were detected, some of them related to hyperthermophiles. View Full-Text
Keywords: cryoenvironments; prokaryotic diversity; prokaryotic abundance; microbial metabolic activities; predictive functional profiling; Antarctic lakes’ brines cryoenvironments; prokaryotic diversity; prokaryotic abundance; microbial metabolic activities; predictive functional profiling; Antarctic lakes’ brines
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MDPI and ACS Style

Papale, M.; Rizzo, C.; Caruso, G.; La Ferla, R.; Maimone, G.; Lo Giudice, A.; Azzaro, M.; Guglielmin, M. First Insights into the Microbiology of Three Antarctic Briny Systems of the Northern Victoria Land. Diversity 2021, 13, 323. https://doi.org/10.3390/d13070323

AMA Style

Papale M, Rizzo C, Caruso G, La Ferla R, Maimone G, Lo Giudice A, Azzaro M, Guglielmin M. First Insights into the Microbiology of Three Antarctic Briny Systems of the Northern Victoria Land. Diversity. 2021; 13(7):323. https://doi.org/10.3390/d13070323

Chicago/Turabian Style

Papale, Maria, Carmen Rizzo, Gabriella Caruso, Rosabruna La Ferla, Giovanna Maimone, Angelina Lo Giudice, Maurizio Azzaro, and Mauro Guglielmin. 2021. "First Insights into the Microbiology of Three Antarctic Briny Systems of the Northern Victoria Land" Diversity 13, no. 7: 323. https://doi.org/10.3390/d13070323

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