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Survival of thermophilic and hyperthermophilic microorganisms after exposure to UV-C, ionizing radiation and desiccation

Beblo, Kristina und Douki, Thierry und Schmalz, Gottfried und Rachel, Reinhard und Wirth, Reinhard und Huber, Harald und Reitz, Guenther und Rettberg, Petra (2011) Survival of thermophilic and hyperthermophilic microorganisms after exposure to UV-C, ionizing radiation and desiccation. Archives of Microbiology, 193 (11), Seiten 797-809. Springer. DOI: 10.1007/s00203-011-0718-5. ISSN 0302-8933.

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Kurzfassung

In this study, we investigated the ability of several (hyper-) thermophilic Archaea and phylogenetically deep-branching thermophilic Bacteria to survive high fluences of monochromatic UV-C (254 nm) and high doses of ionizing radiation, respectively. Nine out of fourteen tested microorganisms showed a surprisingly high tolerance against ionizing radiation, and two species (Aquifex pyrophilus and Ignicoccus hospitalis) were even able to survive 20 kGy. Therefore, these species had a comparable survivability after exposure to ionizing radiation such as Deinococcus radiodurans. In contrast, there was nearly no difference in survival of the tested strains after exposure to UV-C under anoxic conditions. If the cells had been dried in advance of UV-C irradiation, they were more sensitive to UV-C radiation compared with cells irradiated in liquid suspension; this effect could be reversed by the addition of protective material like sulfidic ores before irradiation. By exposure to UV-C, photoproducts were formed in the DNA of irradiated Archaea and Bacteria. The distribution of the main photoproducts was species specific, but the amount of the photoproducts was only partly dependent on the applied fluence. Overall, our results show that tolerance to radiation seems to be a common phenomenon among thermophilic and hyperthermophilic microorganisms.

Dokumentart:Zeitschriftenbeitrag
Titel:Survival of thermophilic and hyperthermophilic microorganisms after exposure to UV-C, ionizing radiation and desiccation
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Beblo, Kristina Radiation Biology Division, Institute of Aerospace Medicine, German Aerospace Center (DLR e.V.), Linder Hoehe, 51147 Cologne, Germany and Institute for Microbiology and Archaea Center, Faculty of Biology and Preclinical Medicine, University Regensburg
Douki, Thierry Laboratoire ‘‘Lésions des Acides Nucléiques’’, Service de Chimie Inorganique et Biologique CEA/DSM/Département de Recherche Fondamentale sur la Matiére Condensée, CEA-Grenoble, Grenoble, France
Schmalz, Gottfried Department of Operative Dentistry and Periodontology, Regensburg University Clinics, Regensburg, Germany
Rachel, Reinhard Center for Electron Microscopy, Faculty of Biology and Preclinical Medicine, University Regensburg, Regensburg, Germany
Wirth, Reinhard Institute for Microbiology and Archaea Center, Faculty of Biology and Preclinical Medicine, University Regensburg, Regensburg, Germany
Huber, HaraldInstitute for Microbiology and Archaea Center, Faculty of Biology and Preclinical Medicine, University Regensburg, Regensburg, Germany
Reitz, Guenther Radiation Biology Division, Institute of Aerospace Medicine, German Aerospace Center (DLR e.V.), Linder Hoehe, 51147 Cologne, Germany
Rettberg, Petra Radiation Biology Division, Institute of Aerospace Medicine, German Aerospace Center (DLR e.V.), Linder Hoehe, 51147 Cologne, Germany
Datum:2011
Erschienen in:Archives of Microbiology
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:193
DOI :10.1007/s00203-011-0718-5
Seitenbereich:Seiten 797-809
Verlag:Springer
ISSN:0302-8933
Status:veröffentlicht
Stichwörter:Radiation, UV-C, Ionizing, Survival, Hyperthermophilic, Desiccation
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Forschung unter Weltraumbedingungen
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R FR - Forschung unter Weltraumbedingungen
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Strahlenbiologie
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Luft- und Raumfahrtmedizin > Strahlenbiologie
Hinterlegt von: Kerstin Kopp
Hinterlegt am:11 Okt 2011 10:33
Letzte Änderung:07 Feb 2013 20:09

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