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Effects of ionizing radiation on the survival of bacterial spores in artificial Martian regolith

Moeller, Ralf and Rohde, Manfred and Reitz, Guenther (2010) Effects of ionizing radiation on the survival of bacterial spores in artificial Martian regolith. Icarus: International Journal of Solar System Studies, 206 (2), pp. 783-786. Elsevier. DOI: 10.1016/j.icarus.2009.11.014 ISSN 0019-1035

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Abstract

Bacterial spores of Bacillus subtilis were used as a model system to study the effects of ionizing 33 radiation on the survivability of spores uncovered and covered with artificial Martian regolith. Spore 34 survival after X-ray exposure was mainly depending on the role of non-homologous end-joining 35 (NHEJ) as the major DNA double-strand break repair pathway during germination, the involvement of 36 major small, acid-soluble spore proteins (SASP) as DNA radioprotectants and the coverage by Martian 37 regolith, whereas spores covered with Martian regolith were significantly more sensitive to X-rays than 38 uncovered spores, which is mainly due to the interaction of X-rays with artificial Martian regolith 39 resulting in the formation of secondary electrons and reactive oxygen species.

Item URL in elib:https://elib.dlr.de/61974/
Document Type:Article
Title:Effects of ionizing radiation on the survival of bacterial spores in artificial Martian regolith
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Moeller, RalfUNSPECIFIEDUNSPECIFIED
Rohde, ManfredHelmholtz Centre for Infection Research, Department of Microbial Pathogenesis, Inhoffenstraße 7, D-38124 Braunschweig, Germany.UNSPECIFIED
Reitz, GuentherUNSPECIFIEDUNSPECIFIED
Date:2010
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:206
DOI :10.1016/j.icarus.2009.11.014
Page Range:pp. 783-786
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Bacillus spores, Mars, Regoliths, DNA repair, ionizing radiation, Astrobiology, Exobiology
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Strahlenbiologie (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:12 Mar 2010 09:44
Last Modified:07 Feb 2013 20:19

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