Schirmack, J. und Böhm, M. und Bauer, C. und Löhmannsröben, H.G. und de Vera, Jean Pierre Paul und Möhlmann, D. und Wagner, D. (2013) Laser spectroscopic real time measurements of methanogenic activity under simulated Martian subsurface analogue conditions. Planetary and Space Science. Elsevier. doi: 10.1016/j.pss.2013.08.019. ISSN 0032-0633.
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Kurzfassung
On Earth, chemolithoautothrophic and anaerobic microorganisms such as methanogenic archaea are regarded as model organisms for possible subsurface life on Mars. For this reason, the methanogenic strain Methanosarcina soligelidi (formerly called Methanosarcina spec. SMA-21), isolated from permafrost-affected soil in northeast Siberia, has been tested under Martian thermo-physical conditions. In previous studies under simulated Martian conditions, high survival rates of these microorganisms were observed. In our study we present a method to measure methane production as first attempt to study metabolic activity of methanogenic archaea during simulated conditions, which are approaching conditions of Mars-like environments. To determine methanogenic activity, a measurement technique which is capable to measure the produced methane concentration with high precision and with high temporal resolution is needed. Although there are several methods to detect methane, only a few fulfill all the needed requirements to work within simulated extraterrestrial environments. We have chosen laser spectroscopy, which is a non-destructive technique that measures the methane concentration without sample taking and also can be run continuously. In our simulation, we detected methane production at temperatures down to -5°C, which would be found on Mars either temporarily in the shallow subsurface or continually in the deep subsurface. The pressure of 50 kPa which we used in our experiments, corresponds to the expected pressure in the Martian near subsurface. Our new device proved to be fully functional and the results indicate that the possible existence of methanogenic archaea in Martian subsurface habitats cannot be ruled out.
elib-URL des Eintrags: | https://elib.dlr.de/83654/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||
Zusätzliche Informationen: | Bisher nur online erschienen. | ||||||||||||||||||||||||||||||||
Titel: | Laser spectroscopic real time measurements of methanogenic activity under simulated Martian subsurface analogue conditions | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 23 August 2013 | ||||||||||||||||||||||||||||||||
Erschienen in: | Planetary and Space Science | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
DOI: | 10.1016/j.pss.2013.08.019 | ||||||||||||||||||||||||||||||||
Verlag: | Elsevier | ||||||||||||||||||||||||||||||||
ISSN: | 0032-0633 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | Mars; Methanogens; Methane; Sub-zero temperature (Celsius); Wavelength Modulation Spectroscopy (Laser Spectroscopy) | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Erforschung des Weltraums | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | R EW - Erforschung des Weltraums | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Exploration des Sonnensystems | ||||||||||||||||||||||||||||||||
Standort: | Berlin-Adlershof | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Planetenforschung > Experimentelle Planetenphysik | ||||||||||||||||||||||||||||||||
Hinterlegt von: | de Vera, Dr. Jean Pierre Paul | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 28 Nov 2013 11:08 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 23 Jun 2023 09:11 |
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