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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.
| Document Type: | Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Title: | Effects of ionizing radiation on the survival of bacterial spores in artificial Martian regolith | ||||||||
| Authors: |
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| Date: | 2010 | ||||||||
| Journal or Publication Title: | Icarus: International Journal of Solar System Studies | ||||||||
| Refereed publication: | Yes | ||||||||
| In 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 | ||||||||
| HGF - Program: | Space | ||||||||
| HGF - Program Themes: | W FR - Forschung unter Weltraumbedingungen | ||||||||
| 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: | Kerstin Kopp | ||||||||
| Deposited On: | 12 Mar 2010 09:44 | ||||||||
| Last Modified: | 07 Feb 2013 20:19 |
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