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Adaption of an Antarctic lichen to Martian niche conditions can occur within 34 days

de Vera, Jean Pierre Paul and Schulze-Makuch, D. and Khan, A. and Lorek, Andreas and Möhlmann, D. and Spohn, Tilman (2014) Adaption of an Antarctic lichen to Martian niche conditions can occur within 34 days. Planetary and Space Science, 98, pp. 182-190. Elsevier. ISSN 0032-0633

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Abstract

Stresses occurring on the Martian surface were simulated in a Mars Simulation Chamber (MSC) and included high UV fluxes (Zarnecki andCatling,2002), low temperatures, low water activity, high atmospheric CO2 concentrations, and an atmospheric pressure of about 800Pa (Kasting, 1991; Head etal., 2003). The lichen Pleopsidium chlorophanum is an extremophile that lives in very cold, dry, high-altitude habitats, which are Earth's best approximation of the Martian surface. Samples with P.chlorophanum were exposed uninterruptedly to simulated conditions of the unprotected Martian surface (i.e. 6344kJ/m^2) and protected niche conditions (269kJ/m^2) for 34 days. Under unprotected Martian surface conditions the fungal symbiont decreases its metabolic activity and it was unclear if the algal symbiont of the lichen was still actively photosynthesizing. However,under “protected site” conditions, the entire lichen not only survived and remained photosynthetically active, it even adapted physiologically by increasing its photosynthetic activity over 34 days.

Item URL in elib:https://elib.dlr.de/97969/
Document Type:Article
Title:Adaption of an Antarctic lichen to Martian niche conditions can occur within 34 days
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
de Vera, Jean Pierre Pauljean-pierre.devera (at) dlr.deUNSPECIFIED
Schulze-Makuch, D.School of Earth and Environmental Sciences, Washington State University, Pullman, USAUNSPECIFIED
Khan, A.School of Earth and Environmental Sciences, Washington State University, Pullman, USAUNSPECIFIED
Lorek, AndreasAndreas.Lorek (at) dlr.dehttps://orcid.org/0000-0002-8960-6214
Möhlmann, D.dirk.moehlmann (at) dlr.deUNSPECIFIED
Spohn, TilmanTilman.Spohn (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:98
Page Range:pp. 182-190
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:Mars simulation, lichen, photosynthesis, adaption, astrobiology, UV radiation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Spohn, Tilman
Deposited On:04 Sep 2015 08:55
Last Modified:31 Jul 2019 19:54

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