Survival of Methanogenic Archaea from Siberian Permafrost under Simulated Martian Thermal Conditions |
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Authors: | Daria Morozova Diedrich Möhlmann Dirk Wagner |
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Institution: | (1) Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg A 43, 14473 Potsdam, Germany;(2) DLR Institute of Planetary Research, Rutherfordstr. 2, 12489 Berlin, Germany |
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Abstract: | Methanogenic archaea from Siberian permafrost complementary to the already well-studied methanogens from non-permafrost habitats
were exposed to simulated Martian conditions. After 22 days of exposure to thermo-physical conditions at Martian low- and
mid-latitudes up to 90% of methanogenic archaea from Siberian permafrost survived in pure cultures as well as in environmental
samples. In contrast, only 0.3%–5.8% of reference organisms from non-permafrost habitats survived at these conditions. This
suggests that methanogens from terrestrial permafrost seem to be remarkably resistant to Martian conditions. Our data also
suggest that in scenario of subsurface lithoautotrophic life on Mars, methanogenic archaea from Siberian permafrost could
be used as appropriate candidates for the microbial life on Mars. |
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Keywords: | methanogenic archaea permafrost astrobiology life on Mars Mars simulation experiments |
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