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The responses of an anaerobic microorganism, Yersinia intermedia MASE-LG-1 to individual and combined simulated Martian stresses

The responses of an anaerobic microorganism, Yersinia intermedia MASE-LG-1 to individual and combined simulated Martian stresses


Titill: The responses of an anaerobic microorganism, Yersinia intermedia MASE-LG-1 to individual and combined simulated Martian stresses
Höfundur: Beblo-Vranesevic, Kristina
Bohmeier, Maria
Perras, Alexandra K.
Schwendner, Petra
Rabbow, Elke
Moissl-Eichinger, Christine
Cockell, Charles S.
Pukall, Rüdiger
Vannier, Pauline
Marteinsson, Viggó Þór
... 11 fleiri höfundar Sýna alla höfunda
Útgáfa: 2017-10-25
Tungumál: Enska
Umfang: e0185178
Háskóli/Stofnun: Háskóli Íslands
University of Iceland
Svið: Heilbrigðisvísindasvið (HÍ)
School of Health Sciences (UI)
Deild: Matvæla- og næringarfræðideild (HÍ)
Faculty of Food Science and Nutrition (UI)
Birtist í: PLoS ONE;12(10)
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0185178
Efnisorð: Perchlorates; Ionizing radiation; Yersinia; Vacuum desiccation; Oxygen; Lakes; Laboratory glassware; Mars (reikistjarna); Geislun; Súrefni; Stöðuvötn; Örverur
URI: https://hdl.handle.net/20.500.11815/515

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Tilvitnun:

Beblo-Vranesevic K, Bohmeier M, Perras AK, Schwendner P, Rabbow E, Moissl-Eichinger C, et al. (2017) The responses of an anaerobic microorganism, Yersinia intermedia MASE-LG-1 to individual and combined simulated Martian stresses. PLoS ONE 12(10): e0185178. https://doi.org/10.1371/journal.pone.0185178

Útdráttur:

The limits of life of aerobic microorganisms are well understood, but the responses of anaerobic microorganisms to individual and combined extreme stressors are less well known. Motivated by an interest in understanding the survivability of anaerobic microorganisms under Martian conditions, we investigated the responses of a new isolate, Yersinia intermedia MASE-LG-1 to individual and combined stresses associated with the Martian surface. This organism belongs to an adaptable and persistent genus of anaerobic microorganisms found in many environments worldwide. The effects of desiccation, low pressure, ionizing radiation, varying temperature, osmotic pressure, and oxidizing chemical compounds were investigated. The strain showed a high tolerance to desiccation, with a decline of survivability by four orders of magnitude during a storage time of 85 days. Exposure to X-rays resulted in dose-dependent inactivation for exposure up to 600 Gy while applied doses above 750 Gy led to complete inactivation. The effects of the combination of desiccation and irradiation were additive and the survivability was influenced by the order in which they were imposed. Ionizing irradiation and subsequent desiccation was more deleterious than vice versa. By contrast, the presence of perchlorates was not found to significantly affect the survival of the Yersinia strain after ionizing radiation. These data show that the organism has the capacity to survive and grow in physical and chemical stresses, imposed individually or in combination that are associated with Martian environment. Eventually it lost its viability showing that many of the most adaptable anaerobic organisms on Earth would be killed on Mars today.

Leyfi:

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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