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Impact of simulated Martian conditions (perchlorates, drought, radiation) on bacterial strains from different Mars analog

Beblo-Vranesevic, Kristina and Bohmeier, Maria and Schleumer, Sven and Rabbow, Elke and Rettberg, Petra and the MASE Team (2018) Impact of simulated Martian conditions (perchlorates, drought, radiation) on bacterial strains from different Mars analog. In: EANA 2018 - Abstractbook. EANA 2018, 24-28 September 2018, Berlin, Germany.

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Official URL: http://www.eana-net.eu/index.php?page=Conferences/EANA2018

Abstract

Five (facultative) 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 from different extreme terrestrial environments were subjected to Mars relevant environmental stress factors (low water activity, oxidizing compounds, ionizing radiation) in the laboratory under controlled anoxic conditions. The survival after addition of sodium perchlorate at different concentrations for dedicated time points was species specific. The inter comparison of the five microorganisms revealed that Clostridium sp. MASE-IM-4 was the most sensitive strain (D10-value = 0.6 M). The most tolerant microorganism was Trichococcus sp. MASE-IM-5 with a D10-value around 1.9 M after fifteen minutes treatment with sodium perchlorate. In parallel, the cultivation and growth of the strains in the presence of sodium perchlorate in Martian relevant concentrations (0.5 % / 1 % wt/vol) led mostly to agglomeration of the tested cells. Treatment with desiccation and ionizing radiation, applied one after the other, led to additive effects as well as an enhanced radiation tolerance in two strains. The combination of desiccation and Martian atmosphere led only to additive effects. In conclusion, the tested microorganisms from Mars analogues sites showed that survival is hypothetical possible in deeper subsurface regions on planet Mars to some extent.

Item URL in elib:https://elib.dlr.de/124394/
Document Type:Conference or Workshop Item (Speech)
Title:Impact of simulated Martian conditions (perchlorates, drought, radiation) on bacterial strains from different Mars analog
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Beblo-Vranesevic, KristinaRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; kristina.beblo (at) dlr.dehttps://orcid.org/0000-0002-4834-7121
Bohmeier, MariaRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, GermanyUNSPECIFIED
Schleumer, SvenRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany and Hochschule Niederrhein, University of Applied Sciences, Faculty Industrial Engineering, Krefeld, GermanyUNSPECIFIED
Rabbow, ElkeRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; Elke.Rabbow (at) dlr.dehttps://orcid.org/0000-0002-9301-2021
Rettberg, Petra and the MASE TeamRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; petra.rettberg (at) dlr.dehttps://orcid.org/0000-0003-4439-2395
Date:27 September 2018
Journal or Publication Title:EANA 2018 - Abstractbook
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Mars, MASE
Event Title:EANA 2018
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:24-28 September 2018
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:10 Dec 2018 15:51
Last Modified:31 Jul 2019 20:22

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