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Lack of correlation of desiccation and radiation tolerance in microorganisms from diverse extreme environments tested under anoxic conditions

Lack of correlation of desiccation and radiation tolerance in microorganisms from diverse extreme environments tested under anoxic conditions


Title: Lack of correlation of desiccation and radiation tolerance in microorganisms from diverse extreme environments tested under anoxic conditions
Author: Beblo-Vranesevic, Kristina
Bohmeier, Maria
Perras, Alexandra K
Schwendner, Petra
Rabbow, Elke
Moissl-Eichinger, Christine
Cockell, Charles S
Vannier, Pauline
Marteinsson, Viggó   orcid.org/0000-0001-8340-821X
Monaghan, Euan P
... 10 more authors Show all authors
Date: 2018-02-21
Language: English
University/Institute: Háskóli Íslands
University of Iceland
School: Heilbrigðisvísindasvið (HÍ)
School of Health Sciences (UI)
Department: Matvæla- og næringarfræðideild (HÍ)
Faculty of Food Science and Nutrition (UI)
Series: FEMS Microbiology Letters;365(6)
ISSN: 1574-6968 (eISSN)
0378-1097
DOI: 10.1093/femsle/fny044
Subject: Desiccation; Radiation tolerance; Radiation; Ionizing; Microorganisms; Extreme environments; Örverur; Gerlar; Geislun
URI: https://hdl.handle.net/20.500.11815/1120

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Citation:

Rabbow, E., Bohmeier, M., Rettberg, P., Beblo-Vranesevic, K., Gómez, F., Garcia-Descalzo, L., . . . Ehrenfreund, P. (2018). Lack of correlation of desiccation and radiation tolerance in microorganisms from diverse extreme environments tested under anoxic conditions. FEMS Microbiology Letters, 365(6). doi:10.1093/femsle/fny044

Abstract:

Four facultative anaerobic and two obligate anaerobic bacteria were isolated from extreme environments (deep subsurface halite mine, sulfidic anoxic spring, mineral-rich river) in the frame MASE (Mars Analogues for Space Exploration) project. The isolates were investigated under anoxic conditions for their survivability after desiccation up to 6 months and their tolerance to ionizing radiation up to 3000 Gy. The results indicated that tolerances to both stresses are strain-specific features. Yersinia intermedia MASE-LG-1 showed a high desiccation tolerance but its radiation tolerance was very low. The most radiation-tolerant strains were Buttiauxella sp. MASE-IM-9 and Halanaerobium sp. MASE-BB-1. In both cases, cultivable cells were detectable after an exposure to 3 kGy of ionizing radiation, but cells only survived desiccation for 90 and 30 days, respectively. Although a correlation between desiccation and ionizing radiation resistance has been hypothesized for some aerobic microorganisms, our data showed that there was no correlation between tolerance to desiccation and ionizing radiation, suggesting that the physiological basis of both forms of tolerances is not necessarily linked. In addition, these results indicated that facultative and obligate anaerobic organisms living in extreme environments possess varied species-specific tolerances to extremes

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This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

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