Scalzi, Giuliano and Selbmann, Laura and Zucconi, Laura and Rabbow, Elke and Horneck, Gerda and Albertano, Patrizia and Onofri, Silvano (2012) LIFE Experiment: Isolation of Cryptoendolithic Organisms from Antarctic Colonized Sandstone Exposed to Space and Simulated Mars Conditions on the International Space Station. Origins of Life and Evolution of Biospheres, 42 (2-3), pp. 253-262. Springer Verlag. DOI: 10.1007/s11084-012-9282-5. ISSN 0169-6149.
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Desiccated Antarctic rocks colonized by cryptoendolithic communities were exposed on the International Space Station (ISS) to space and simulated Mars conditions (LiFE—Lichens and Fungi Experiment). After 1.5 years in space samples were retrieved, rehydrated and spread on different culture media. Colonies of a green alga and a pink-coloured fungus developed on Malt-Agar medium; they were isolated from a sample exposed to simulated Mars conditions beneath a 0.1 %T Suprasil neutral density filter and from a sample exposed to space vacuum without solar radiation exposure, respectively. None of the other flight samples showed any growth after incubation. The two organisms able to grow were identified at genus level by Small SubUnit (SSU) and Internal Transcribed Spacer (ITS) rDNA sequencing as Stichococcus sp. (green alga) and Acarospora sp. (lichenized fungal genus) respectively. The data in the present study provide experimental information on the possibility of eukaryotic life transfer from one planet to another by means of rocks and of survival in Mars environment.
|Title:||LIFE Experiment: Isolation of Cryptoendolithic Organisms from Antarctic Colonized Sandstone Exposed to Space and Simulated Mars Conditions on the International Space Station|
|Journal or Publication Title:||Origins of Life and Evolution of Biospheres|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 253-262|
|Keywords:||Antarctic colonized rocks, EXPOSE-E, International space station, Lithopanspermia, Lichens and Fungi Experiment|
|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|
|Institutes and Institutions:||Institute of Aerospace Medicine > Radiation Biology|
|Deposited By:||Kerstin Kopp|
|Deposited On:||10 Aug 2012 09:38|
|Last Modified:||07 Feb 2013 19:31|
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