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Mineralization and Preservation of an extremotolerant Bacterium Isolated from an Early Mars Analog Environment

Gaboyer, F. and Le Milbeau, C. and Bohmeier, M. and Schwendner, P. and Vannier, P. and Beblo-Vranesevic, Kristina and Rabbow, Elke and Foucher, F. and Gautret, P. and Guégan, R. and Richard, A. and Sauldubois, A. and Richmann, P. and Perras, A.K. and Moissl-Eichinger, C. and Cockell, C.S. and Rettberg, Petra and Marteinsson, V. and Monaghan, E. and Ehrenfreund, P. and Garcia-Descalzo, L. and Gomez, F. and Malki, M. and Amils, R. and Cabezas, P. and Walter, N. and Westall, F. (2017) Mineralization and Preservation of an extremotolerant Bacterium Isolated from an Early Mars Analog Environment. Scientific Reports, 7 (8775). Nature Publishing Group. DOI: 10.1038/s41598-017-08929-4 ISSN 2045-2322

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Official URL: http://dx.doi.org/10.1038/s41598-017-08929-4

Abstract

The artificial mineralization of a polyresistant bacterial strain isolated from an acidic, oligotrophic lake was carried out to better understand microbial (i) early mineralization and (ii) potential for further fossilisation. Mineralization was conducted in mineral matrixes commonly found on Mars and Early- Earth, silica and gypsum, for 6 months. Samples were analyzed using microbiological (survival rates), morphological (electron microscopy), biochemical (GC-MS, Microarray immunoassay, Rock-Eval) and spectroscopic (EDX, FTIR, RAMAN spectroscopy) methods. We also investigated the impact of physiological status on mineralization and long-term fossilisation by exposing cells or not to Marsrelated stresses (desiccation and radiation). Bacterial populations remained viable after 6 months although the kinetics of mineralization and cell-mineral interactions depended on the nature of minerals. Detection of biosignatures strongly depended on analytical methods, successful with FTIR and EDX but not with RAMAN and immunoassays. Neither influence of stress exposure, nor qualitative and quantitative changes of detected molecules were observed as a function of mineralization time and matrix. Rock-Eval analysis suggests that potential for preservation on geological times may be possible only with moderate diagenetic and metamorphic conditions. The implications of our results for microfossil preservation in the geological record of Earth as well as on Mars are discussed.

Item URL in elib:https://elib.dlr.de/113954/
Document Type:Article
Title:Mineralization and Preservation of an extremotolerant Bacterium Isolated from an Early Mars Analog Environment
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gaboyer, F.centre de biophysique moléculaire, cnrs, orléans, france. frederic.gaboyer (at) cnrs-orleans.frUNSPECIFIED
Le Milbeau, C.institut des sciences de la terre d’orléans, umr 7327, cnrs-université d’orléans, franceUNSPECIFIED
Bohmeier, M.radiation biology department, institute of aerospace medicine, german aerospace center (dlr), cologne, germanyUNSPECIFIED
Schwendner, P.uk center for astrobiology, school of physics and astronomy, univer-sity of edinburgh, edinburgh, united kingdomUNSPECIFIED
Vannier, P.matis - prokaria, reykjavík, icelandUNSPECIFIED
Beblo-Vranesevic, Kristinaradiation biology department, institute of aerospace medicine, german aerospace center (dlr), cologne, germanyhttps://orcid.org/0000-0002-4834-7121
Rabbow, Elkeradiation biology department, institute of aerospace medicine, german aerospace center (dlr), cologne, germany.https://orcid.org/0000-0002-9301-2021
Foucher, F.Centre de Biophysique Moléculaire, CNRS, Orléans, FranceUNSPECIFIED
Gautret, P.institut des sciences de la terre d’orléans, umr 7327, cnrs-université d’orléans, franceUNSPECIFIED
Guégan, R.institut des sciences de la terre d’orléans, umr 7327, cnrs-université d’orléans, franceUNSPECIFIED
Richard, A.Centre de Microscopie Electronique, Université d’Orléans, Orléans, FranceUNSPECIFIED
Sauldubois, A.Centre de Microscopie Electronique, Université d’Orléans, Orléans, FranceUNSPECIFIED
Richmann, P.institut des sciences de la terre d’orléans, umr 7327, cnrs-université d’orléans, franceUNSPECIFIED
Perras, A.K.University Regensburg Department of Microbiology, Regensburg, Germany and 13Medical University of Graz, Department of Internal Medicine, Graz, AustriaUNSPECIFIED
Moissl-Eichinger, C.BioTechMed Graz, Graz, AustriaUNSPECIFIED
Cockell, C.S.uk center for astrobiology, school of physics and astronomy, univer-sity of edinburgh, edinburgh, united kingdomUNSPECIFIED
Rettberg, Petraradiation biology department, institute of aerospace medicine, german aerospace center (dlr), cologne, germany; petra.rettberg (at) dlr.dehttps://orcid.org/0000-0003-4439-2395
Marteinsson, V.matis - prokaria, reykjavík, icelandUNSPECIFIED
Monaghan, E.Leiden Observatory, Universiteit Leiden, Leiden, NetherlandsUNSPECIFIED
Ehrenfreund, P.Leiden Observatory, Universiteit Leiden, Leiden, NetherlandsUNSPECIFIED
Garcia-Descalzo, L.instituto nacional de técnica aeroespacial – centro de astrobiología (inta-cab), madrid, spainUNSPECIFIED
Gomez, F.instituto nacional de técnica aeroespacial – centro de astrobiología (inta-cab), madrid, spainUNSPECIFIED
Malki, M.Universidad Autónoma de Madrid (UAM), Madrid, SpainUNSPECIFIED
Amils, R.Universidad Autónoma de Madrid (UAM), Madrid, SpainUNSPECIFIED
Cabezas, P.European Science Foundation (ESF), Strasbourg, FranceUNSPECIFIED
Walter, N.European Science Foundation (ESF), Strasbourg, FranceUNSPECIFIED
Westall, F.European Science Foundation (ESF), Strasbourg, FranceUNSPECIFIED
Date:2017
Journal or Publication Title:Scientific Reports
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:7
DOI :10.1038/s41598-017-08929-4
Publisher:Nature Publishing Group
ISSN:2045-2322
Status:Published
Keywords:MASE project (Mars Analogue for Space Exploration), Mars,
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:25 Sep 2017 13:54
Last Modified:01 Dec 2018 19:53

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