Biodiversity of UV-Resistant Bacteria in Antarctic Aquatic Environments
Antarctica is an untapped reservoir of bacterial communities, which are able to adapt to a huge variety of strategies to cope with extreme conditions and, therefore, are capable of producing potentially valuable compounds for biotechnological applications. In this study, 31 UV-resistant bacteria col...
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ftdoajarticles:oai:doaj.org/article:7fa99244bcc64c108763bdcbecea54a3 2023-06-11T04:06:23+02:00 Biodiversity of UV-Resistant Bacteria in Antarctic Aquatic Environments Daniela Coppola Chiara Lauritano Gianluca Zazo Genoveffa Nuzzo Angelo Fontana Adrianna Ianora Maria Costantini Cinzia Verde Daniela Giordano 2023-05-01T00:00:00Z https://doi.org/10.3390/jmse11050968 https://doaj.org/article/7fa99244bcc64c108763bdcbecea54a3 EN eng MDPI AG https://www.mdpi.com/2077-1312/11/5/968 https://doaj.org/toc/2077-1312 doi:10.3390/jmse11050968 2077-1312 https://doaj.org/article/7fa99244bcc64c108763bdcbecea54a3 Journal of Marine Science and Engineering, Vol 11, Iss 968, p 968 (2023) Antarctica UV radiation UV-C assay UV-resistance marine bacterium lake microorganism Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 article 2023 ftdoajarticles https://doi.org/10.3390/jmse11050968 2023-05-28T00:33:50Z Antarctica is an untapped reservoir of bacterial communities, which are able to adapt to a huge variety of strategies to cope with extreme conditions and, therefore, are capable of producing potentially valuable compounds for biotechnological applications. In this study, 31 UV-resistant bacteria collected from different Antarctic aquatic environments (surface sea waters/ice and shallow lake sediments) were isolated by UV-C assay and subsequently identified. A phylogenetic analysis based on 16S rRNA gene sequence similarities showed that the isolates were affiliated with Proteobacteria, Actinobacteria and Firmicutes phyla, and they were clustered into 15 bacterial genera, 5 of which were Gram negative ( Brevundimonas , Qipengyuania , Sphingorhabdus , Sphingobium , and Psychrobacter ) and 10 of which were Gram positive ( Staphylococcus , Bacillus , Mesobacillus , Kocuria , Gordonia , Rhodococcus , Micrococcus , Arthrobacter , Agrococcus , and Salinibacterium ). Strains belonging to Proteobacteria and Actinobacteria phyla were the most abundant species in all environments. The genus Psychrobacter was dominant in all collection sites, whereas bacteria belonging to Actinobacteria appeared to be the most diverse and rich in terms of species among the investigated sites. Many of these isolates (20 of 31 isolates) were pigmented. Bacterial pigments, which are generally carotenoid-type compounds, are often involved in the protection of cells against the negative effects of UV radiation. For this reason, these pigments may help bacteria to successfully tolerate Antarctic extreme conditions of low temperature and harmful levels of UV radiation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic Journal of Marine Science and Engineering 11 5 968 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctica UV radiation UV-C assay UV-resistance marine bacterium lake microorganism Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
spellingShingle |
Antarctica UV radiation UV-C assay UV-resistance marine bacterium lake microorganism Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Daniela Coppola Chiara Lauritano Gianluca Zazo Genoveffa Nuzzo Angelo Fontana Adrianna Ianora Maria Costantini Cinzia Verde Daniela Giordano Biodiversity of UV-Resistant Bacteria in Antarctic Aquatic Environments |
topic_facet |
Antarctica UV radiation UV-C assay UV-resistance marine bacterium lake microorganism Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
description |
Antarctica is an untapped reservoir of bacterial communities, which are able to adapt to a huge variety of strategies to cope with extreme conditions and, therefore, are capable of producing potentially valuable compounds for biotechnological applications. In this study, 31 UV-resistant bacteria collected from different Antarctic aquatic environments (surface sea waters/ice and shallow lake sediments) were isolated by UV-C assay and subsequently identified. A phylogenetic analysis based on 16S rRNA gene sequence similarities showed that the isolates were affiliated with Proteobacteria, Actinobacteria and Firmicutes phyla, and they were clustered into 15 bacterial genera, 5 of which were Gram negative ( Brevundimonas , Qipengyuania , Sphingorhabdus , Sphingobium , and Psychrobacter ) and 10 of which were Gram positive ( Staphylococcus , Bacillus , Mesobacillus , Kocuria , Gordonia , Rhodococcus , Micrococcus , Arthrobacter , Agrococcus , and Salinibacterium ). Strains belonging to Proteobacteria and Actinobacteria phyla were the most abundant species in all environments. The genus Psychrobacter was dominant in all collection sites, whereas bacteria belonging to Actinobacteria appeared to be the most diverse and rich in terms of species among the investigated sites. Many of these isolates (20 of 31 isolates) were pigmented. Bacterial pigments, which are generally carotenoid-type compounds, are often involved in the protection of cells against the negative effects of UV radiation. For this reason, these pigments may help bacteria to successfully tolerate Antarctic extreme conditions of low temperature and harmful levels of UV radiation. |
format |
Article in Journal/Newspaper |
author |
Daniela Coppola Chiara Lauritano Gianluca Zazo Genoveffa Nuzzo Angelo Fontana Adrianna Ianora Maria Costantini Cinzia Verde Daniela Giordano |
author_facet |
Daniela Coppola Chiara Lauritano Gianluca Zazo Genoveffa Nuzzo Angelo Fontana Adrianna Ianora Maria Costantini Cinzia Verde Daniela Giordano |
author_sort |
Daniela Coppola |
title |
Biodiversity of UV-Resistant Bacteria in Antarctic Aquatic Environments |
title_short |
Biodiversity of UV-Resistant Bacteria in Antarctic Aquatic Environments |
title_full |
Biodiversity of UV-Resistant Bacteria in Antarctic Aquatic Environments |
title_fullStr |
Biodiversity of UV-Resistant Bacteria in Antarctic Aquatic Environments |
title_full_unstemmed |
Biodiversity of UV-Resistant Bacteria in Antarctic Aquatic Environments |
title_sort |
biodiversity of uv-resistant bacteria in antarctic aquatic environments |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/jmse11050968 https://doaj.org/article/7fa99244bcc64c108763bdcbecea54a3 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Journal of Marine Science and Engineering, Vol 11, Iss 968, p 968 (2023) |
op_relation |
https://www.mdpi.com/2077-1312/11/5/968 https://doaj.org/toc/2077-1312 doi:10.3390/jmse11050968 2077-1312 https://doaj.org/article/7fa99244bcc64c108763bdcbecea54a3 |
op_doi |
https://doi.org/10.3390/jmse11050968 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
11 |
container_issue |
5 |
container_start_page |
968 |
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1768378311368507392 |