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TOLERANCE OF ARCHAEA AND BACTERIA AGAINST PERCHLORATE AND HYDROGEN PEROXIDE

Beblo-Vranesevic, Kristina and Bohmeier, Maria and Rettberg, Petra (2016) TOLERANCE OF ARCHAEA AND BACTERIA AGAINST PERCHLORATE AND HYDROGEN PEROXIDE. 41st Scientific Assembly of the Committee on Space Research (COSPAR), 30. Juli - 7. August 2016, Istanbul, Turkey.

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Abstract

Due to the ability of (hyper-) thermophilic Bacteria and Archaea to live in extreme habitats on Earth (e.g. boiling acidic springs, black smoker chimneys, hyper-salinic brines) one could suggest, that these organisms can also outlast other harsh conditions, e.g. prevailing in space or on Mars. On Mars the occurrence of different utilizable nutrition components is limited. The Phoenix lander detected significant amounts (0.4 - 0.6 %) of perchlorate ions in Martian soil. Therefore, we examined the ability of the perchlorate metabolizing Archaeon Archaeoglobus fulgidus as well as phylogenetically deep-branching Bacterium Hydrogenothermus marinus to survive and grow in the presence of perchlorate (NaClO4) and hydrogen peroxide (H₂O₂). The investigated microorganisms were able to tolerate high concentrations of NaClO4 without any changes in their growth pattern. After the addition of 280 mM perchlorate H. marinus showed significant changes in cell morphology. This organism is normally growing as single motile short rods; treated with high concentrations of perchlorate long chains were built. A. fulgidus can tolerate concentrations up to 300 mM. On the contrary, both microorganisms were negatively affected in their survival after a treatment with low concentrations (<50 mM) of H₂O₂. In summary (hyper-) thermophiles have so far unknown high tolerances against cell damaging treatments and may serve as model organisms for future space experiments.

Item URL in elib:https://elib.dlr.de/105915/
Document Type:Conference or Workshop Item (Speech)
Title:TOLERANCE OF ARCHAEA AND BACTERIA AGAINST PERCHLORATE AND HYDROGEN PEROXIDE
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Beblo-Vranesevic, KristinaDivision of Radiation Biology, Institute of Aerospace Medicine, German Aerospace Center (DLR), Linder Hoehe, 51147 Cologne, Germany; kristina.beblo (at) dlr.dehttps://orcid.org/0000-0002-4834-7121
Bohmeier, MariaDivision of Radiation Biology, Institute of Aerospace Medicine, German Aerospace Center (DLR), Linder Hoehe, 51147 Cologne, Germany; maria.bohmeier (at) dlr.deUNSPECIFIED
Rettberg, PetraDivision of Radiation Biology, Institute of Aerospace Medicine, German Aerospace Center (DLR), Linder Hoehe, 51147 Cologne, Germany; petra.rettberg (at) dlr.dehttps://orcid.org/0000-0003-4439-2395
Date:2016
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Mars Analogue Sites on Earth, thermophilic Bacteria and Archaea, Mars
Event Title:41st Scientific Assembly of the Committee on Space Research (COSPAR)
Event Location:Istanbul, Turkey
Event Type:international Conference
Event Dates:30. Juli - 7. August 2016
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:23 Sep 2016 08:01
Last Modified:31 Jul 2019 20:03

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