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Viruses Of Extreme Environments Cover

Abstract

Extremophilic viruses inhabit even the most extreme environments, such as underwater and terrestrial hydrothermal vents, deserts, subpolar areas, deep subsurface sediments, hypersaline environments, and alkaline lakes. These are mainly viruses that infect bacteria (belonging to the Myoviridae and Siphoviridae families) and archaea (classified to the families Lipothrixviridae, Rudiviridae, Yueviridae, Ampullaviridae, Globuloviridae, Sphaerolipoviridae, Bicaudaviridae, Fuselloviridae, Guttaviridae, Clavaviridae, and Turriviridae), some of which have not been fully classified. Extremoviruses have genetic material mainly in the form of dsDNA, both circular and linear, whose average length varies between 14 and 80kbp and is optimal because it is not degraded by high or low temperature, salt solutions or elevated pressure, and encodes all features necessary to function in extreme conditions. This also confirms the much higher resistance of DNA to external factors compared to delicate RNA. Further studies on extremophilic viruses can lead to full sequencing of their genomes, recognition of genes determining resistance traits to unfavorable environmental conditions, and a closer understanding of the full history of the evolution of organisms on Earth.

1. Introduction. 2. Viruses of extremely high temperatures. 2.1. Viruses of hot terrestrial springs. 2.2. Viruses of deep-sea hydrothermal vents. 3. Viruses of deserts. 4. Viruses of subpolar areas. 5. Viruses of subsurface sediments. 6. Viruses of hypersaline areas. 6.1. Viruses of freshwater lakes. 6.2 Viruses of alkaline lakes. 7. Conclusions

DOI: https://doi.org/10.21307/PM-2019.58.4.447 | Journal eISSN: 2545-3149 | Journal ISSN: 0079-4252
Language: English, Polish
Page range: 447 - 454
Submitted on: Jun 1, 2018
Accepted on: Jan 1, 2019
Published on: Dec 31, 2019
Published by: Polish Society of Microbiologists
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2019 Mikołaj Wołącewicz, Dominika Bębnowska, Rafał Hrynkiewicz, Paulina Niedźwiedzka-Rystwej, published by Polish Society of Microbiologists
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.