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Results on the survival of cryptobiotic cyanobacteria samples after exposure to Mars-like environmental conditions

de Vera, Jean Pierre Paul and Dulai, S. and Kereszturi, A. and Koncz, Alexander and Lorek, Andreas and Möhlmann, D. and Marschall, M. and Pocs, T. (2014) Results on the survival of cryptobiotic cyanobacteria samples after exposure to Mars-like environmental conditions. International Journal of Astrobiology, 13 (1), pp. 35-44. Cambridge University Press. DOI: 10.1017/S1473550413000323 ISSN 1473-5504

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Official URL: http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9130902

Abstract

Tests on cyanobacteria communities embedded in cryptobiotic crusts collected in hot and cold deserts on Earth were performed under Mars-like conditions. The simulations were realized as a survey, to find the best samples for future research. During the tests organisms have to resist Mars-like conditions such as atmospheric composition, pressure, variable humidity (saturated and dry conditions) and partly strong UV irradiation. Organisms were tested within their original habitat inside the crust. Nearly half of the cryptobiotic samples from various sites showed survival of a substantial part of their coexisting organisms. The survival in general depended more on the nature of the original habitat and type of the sample than on the different conditions they were exposed to. The best survival was observed in samples from United Arab Emirates (Jebel Ali, 25 km SW of Dubai town) and from Western Australia (near the South edge of Lake Barley), by taxa: Tolypothrix byssoidea, Gloeocapsopsis pleurocapsoides, Nostoc microscopicum, Leptolyngbya or Symploca sp. At both places in salty desert areas members of the Chenopodiaceae family dominated among the higher plants and in the cryptobiotic crust cyanobacterial taxa Tolypothrix was dominant. These organisms were all living in salty locations with dry conditions most of the year. Among them Tolypothrix, Gloeocapsopsis and Symploca sp. were tested in Mars simulation chambers for the first time. The results suggest that extremophiles should be tested with taken into account the context of their original microenvironment, and also the importance to analyse communities of microbes beside single organisms.

Item URL in elib:https://elib.dlr.de/87773/
Document Type:Article
Title:Results on the survival of cryptobiotic cyanobacteria samples after exposure to Mars-like environmental conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
de Vera, Jean Pierre Pauljean-pierre.devera (at) dlr.deUNSPECIFIED
Dulai, S.Departments of Plant Physiology and Botany, Eszterhazy Karoly College, Eger, HungaryUNSPECIFIED
Kereszturi, A.New Europe School for Theoretical Biology and Ecology, HungaryUNSPECIFIED
Koncz, AlexanderAlexander.Koncz (at) dlr.deUNSPECIFIED
Lorek, AndreasAndreas.Lorek (at) dlr.dehttps://orcid.org/0000-0002-8960-6214
Möhlmann, D.dirk.moehlmann (at) dlr.deUNSPECIFIED
Marschall, M.Departments of Plant Physiology and Botany, Eszterhazy Karoly College, Eger, HungaryUNSPECIFIED
Pocs, T.Eszterházy Károly CollegeUNSPECIFIED
Date:1 January 2014
Journal or Publication Title:International Journal of Astrobiology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:13
DOI :10.1017/S1473550413000323
Page Range:pp. 35-44
Publisher:Cambridge University Press
ISSN:1473-5504
Status:Published
Keywords:extremophiles; cyanobacteria; cryptobiotic crust; Mars; simulation
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
Deposited By: de Vera, Dr. Jean Pierre Paul
Deposited On:23 Jan 2014 15:52
Last Modified:01 Dec 2018 19:50

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