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Adaptation 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 Koncz, Alexander and Möhlmann, D. and Spohn, Tilman (2013) Adaptation of an Antarctic lichen to Martian niche conditions can occur within 34 days. Planetary and Space Science. Elsevier. DOI: 10.1016/j.pss.2013.07.014 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 et al., 2002), low temperatures, low water activity, high atmospheric CO2 concentrations, and an atmospheric pressure of about 800 Pa (Kasting, 1991, Head et al., 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. 6344 kJm-2) and protected niche conditions (269 kJm-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 the 34 days.

Item URL in elib:https://elib.dlr.de/83655/
Document Type:Article
Additional Information:Bisher nur online erschienen.
Title:Adaptation 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
Koncz, Alexanderalexander.koncz (at) dlr.deUNSPECIFIED
Möhlmann, D.dirk.moehlmann (at) dlr.deUNSPECIFIED
Spohn, TilmanTilman.Spohn (at) dlr.deUNSPECIFIED
Date:31 July 2013
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.pss.2013.07.014
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:Mars simulation, photosynthesis, adaptation, lichens, 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 > Experimentelle Planetenphysik
Institute of Planetary Research > Planetary Sensor Systems
Institute of Planetary Research > Leitungsbereich PF
Deposited By: de Vera, Dr. Jean Pierre Paul
Deposited On:28 Nov 2013 12:26
Last Modified:01 Dec 2018 19:49

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