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Halophilic archaea as prime candidates for astrobiological research.

Leuko, Stefan and Lamers, G. and Sebastian, M. and Sjöström, S. and Seiler, A. and Moeller, R. and Mancinelli, R. and Rettberg, Petra (2017) Halophilic archaea as prime candidates for astrobiological research. AbSciCon 2017, 24.–28. April 2017, Mesa, Arizona.

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Abstract

Introduction: The quest of exploring and looking for life in unusual or extreme places has been a human desire since centuries. Nowadays, our endeavors start to focus on the exploration of nearby planets in our solar system and the fascinating possibility to find extant life on one of these planets. Recent studies have increased our confidence that liquid water exists in form of high saline brines on the surface of Mars. Such brines may be similar to high salinity environments here on Earth such as solar salterns or salt lakes in Antarctica. The predominant inhabitants of these environments on Earth are halophilic Archaea. These or-ganisms are not only adapted to high osmotic condi-tions, but also to high radiation and fluctuations in temperature. Numerous studies have shown that differ-ent representatives of this family can cope with a wide variety of stress factors such as changes in osmotic pressure, ionizing radiation, different regimes of UV, exposure to simulated microgravity, exposure to Low Earth Orbit (LEO) and a high resistance to prolonged desiccation. Here we report on the resistance of halophilic archaea against bombardment with HZE-particles, their ability to survive in simulated Martian brines as well as the survival following exposure to outer space for 1.5 years during the EXPOSE-R2 mission.

Item URL in elib:https://elib.dlr.de/112308/
Document Type:Conference or Workshop Item (Speech)
Title:Halophilic archaea as prime candidates for astrobiological research.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Leuko, StefanGerman Aerospace Center (DLR e.V.), Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 51147 Cologne, Germany; Stefan.Leuko (at) dlr.dehttps://orcid.org/0000-0002-0423-0896
Lamers, G.German Aerospace Center (DLR e.V.), Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 51147 Cologne, GermanyUNSPECIFIED
Sebastian, M.German Aerospace Center (DLR e.V.), Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 51147 Cologne, GermanyUNSPECIFIED
Sjöström, S.German Aerospace Center (DLR e.V.), Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 51147 Cologne, GermanyUNSPECIFIED
Seiler, A.German Aerospace Center (DLR e.V.), Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 51147 Cologne, GermanyUNSPECIFIED
Moeller, R.German Aerospace Center (DLR e.V.), Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 51147 Cologne, Germany; ralf.moeller (at) dlr.deUNSPECIFIED
Mancinelli, R.UNSPECIFIEDUNSPECIFIED
Rettberg, PetraPetra.Rettberg (at) dlr.dehttps://orcid.org/0000-0003-4439-2395
Date:2017
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Astrobiology, Halophilic Archaea, Mars, EXPOSE-R2 mission
Event Title:AbSciCon 2017
Event Location:Mesa, Arizona
Event Type:international Conference
Event Dates:24.–28. April 2017
Organizer:Lunar and Planetary Institute
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:14 Jun 2017 13:23
Last Modified:31 Jul 2019 20:09

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