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Impact of simulated martian conditions on (Facultatively) anaerobic bacterial strains from different mars analogue sites

Impact of simulated martian conditions on (Facultatively) anaerobic bacterial strains from different mars analogue sites


Title: Impact of simulated martian conditions on (Facultatively) anaerobic bacterial strains from different mars analogue sites
Author: Beblo-Vranesevic, Kristina
Bohmeier, Maria
Schleumer, Sven
Rabbow, Elke
Perras, Alexandra K.
Moissl-Eichinger, Christine
Schwendner, Petra
Cockell, Charles S.
Vannier, Pauline
Marteinsson, Viggo T.
... 13 more authors Show all authors
Date: 2020
Language: English
Scope: 20
Department: Faculty of Food Science and Nutrition
Series: Current Issues in Molecular Biology; 38()
ISSN: 1467-3037
DOI: https://doi.org/10.21775/cimb.038.103
Subject: Sameindalíffræði; Microbiology; Molecular Biology; Microbiology (medical)
URI: https://hdl.handle.net/20.500.11815/3385

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Citation:

Beblo-Vranesevic , K , Bohmeier , M , Schleumer , S , Rabbow , E , Perras , A K , Moissl-Eichinger , C , Schwendner , P , Cockell , C S , Vannier , P , Marteinsson , V T , Monaghan , E P , Riedo , A , Ehrenfreund , P , Garcia-Descalzo , L , Gómez , F , Malki , M , Amils , R , Gaboyer , F , Hickman-Lewis , K , Westall , F , Cabezas , P , Walter , N & Rettberg , P 2020 , ' Impact of simulated martian conditions on (Facultatively) anaerobic bacterial strains from different mars analogue sites ' , Current Issues in Molecular Biology , vol. 38 , pp. 103-122 . https://doi.org/10.21775/cimb.038.103

Abstract:

Five bacterial (facultatively) anaerobic strains, namely Buttiauxella sp. MASE-IM-9, Clostridium sp. MASE-IM-4, Halanaerobium sp. MASE-BB-1, Trichococcus sp. MASE-IM-5, and Yersinia intermedia MASE-LG-1 isolated from different extreme natural environments were subjected to Mars relevant environmental stress factors in the laboratory under controlled conditions. These stress factors encompassed low water activity, oxidizing compounds, and ionizing radiation. Stress tests were performed under permanently anoxic conditions. The survival rate after addition of sodium perchlorate (Na-perchlorate) was found to be species-specific. The inter-comparison of the five microorganisms revealed that Clostridium sp. MASE-IM-4 was the most sensitive strain (D10-value (15 min, NaClO4) = 0.6 M). The most tolerant microorganism was Trichococcus sp. MASE-IM-5 with a calculated D10-value (15 min, NaClO4) of 1.9 M. Cultivation in the presence of Na-perchlorate in Martian relevant concentrations up to 1 wt% led to the observation of chains of cells in all strains. Exposure to Na-perchlorate led to a lowering of the survival rate after desiccation. Consecutive exposure to desiccating conditions and ionizing radiation led to additive effects. Moreover, in a desiccated state, an enhanced radiation tolerance could be observed for the strains Clostridium sp. MASE-IM-4 and Trichococcus sp. MASE-IM-5. These data show that anaerobic microorganisms from Mars analogue environments can resist a variety of Martian-simulated stresses either individually or in combination. However, responses were species-specific and some Mars-simulated extremes killed certain organisms. Thus, although Martian stresses would be expected to act differentially on microorganisms, none of the expected extremes tested here and found on Mars prevent the growth of anaerobic microorganisms.

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Publisher Copyright: © 2020, Caister Academic Press. All rights reserved.

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