elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Enhanced Radiation Resistance of Methanosarcina soligelidi SMA-21, a New Methanogenic Archaeon Isolated from a Siberian Permafrost-Affected Soil in Direct Comparison to Methanosarcina barkeri

Morozova, Daria and Moeller, Ralf and Rettberg, Petra and Wagner, Dirk (2015) Enhanced Radiation Resistance of Methanosarcina soligelidi SMA-21, a New Methanogenic Archaeon Isolated from a Siberian Permafrost-Affected Soil in Direct Comparison to Methanosarcina barkeri. Astrobiology, 15 (11), pp. 951-960. Mary Ann Liebert Inc.. DOI: 10.1089/ast.2015.1319 ISSN 1531-1074

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1089/ast.2015.1319

Abstract

Permafrost-affected soils are characterized by a high abundance and diversity of methanogenic communities, which are considered suitable model organisms for potential life on Mars. Methanogens from Siberian permafrost have been proven to be highly resistant against divers stress conditions such as subzero temperatures, desiccation, and simulated thermophysical martian conditions. Here, we studied the radiation resistance of the currently described new species Methanosarcina soligelidi SMA-21, which was isolated from a Siberian permafrost-affected soil, in comparison to Methanosarcina barkeri, which is used as a reference organism from a nonpermafrost soil environment. Both strains were exposed to solar UV and ionizing radiation to assess their limits of survival. Methanosarcina soligelidi exhibit an increase in radiation resistance to UV (2.5- to 13.8-fold) and ionizing radiation (46.6-fold) compared to M. barkeri. The F₁₀ (UVC) and D₁₀ (X-rays) values of M. soligelidi are comparable to values for the well-known, highly radioresistant species Deinococcus radiodurans. In contrast, the radiation response of M. barkeri was highly sensitive to UV and ionizing radiation comparably to Escherichia coli and other radiosensitive microorganisms. This study showed that species of the same genus respond differently to UV and ionizing radiation, which might reflect the adaptation of Methanosarcina soligelidi SMA-21 to the harsh environmental conditions of the permafrost habitat.

Item URL in elib:https://elib.dlr.de/99502/
Document Type:Article
Title:Enhanced Radiation Resistance of Methanosarcina soligelidi SMA-21, a New Methanogenic Archaeon Isolated from a Siberian Permafrost-Affected Soil in Direct Comparison to Methanosarcina barkeri
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Morozova, DariaGFZ German Research Centre for Geosciences, Helmholtz Centre Potsdam, Section Geomicrobiology, Telegrafenberg, Potsdam, GermanyUNSPECIFIED
Moeller, RalfGerman Aerospace Center (DLR e.V.), Institute of Aerospace Medicine, Radiation Biology Department, Research Group Astrobiology, Köln, GermanyUNSPECIFIED
Rettberg, PetraGerman Aerospace Center (DLR e.V.), Institute of Aerospace Medicine, Radiation Biology Department, Research Group Astrobiology, Köln, GermanyUNSPECIFIED
Wagner, DirkGFZ German Research Centre for Geosciences, Helmholtz Centre Potsdam, Section Geomicrobiology, Telegrafenberg, Potsdam, GermanyUNSPECIFIED
Date:2015
Journal or Publication Title:Astrobiology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:15
DOI :10.1089/ast.2015.1319
Page Range:pp. 951-960
Publisher:Mary Ann Liebert Inc.
ISSN:1531-1074
Status:Published
Keywords:Methanogenic archaea, Environmental UV, Ionizing radiation, Permafrost, Radiation resistance, Mars
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:26 Nov 2015 15:21
Last Modified:06 Sep 2019 15:23

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.