Provision of water by halite deliquescence for Nostoc commune biofilms under Mars relevant surface conditions

dc.contributor.authorJänchen, Jochen
dc.contributor.authorFeyh, Nina
dc.contributor.authorSzewzyk, Ulrich
dc.contributor.authorVera, Jean-Pierre Paul de
dc.date.accessioned2017-11-23T12:54:00Z
dc.date.available2017-11-23T12:54:00Z
dc.date.issued2015
dc.descriptionDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.de
dc.descriptionThis publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.en
dc.description.abstractMotivated by findings of new mineral related water sources for organisms under extremely dry conditions on Earth we studied in an interdisciplinary approach the water sorption behaviour of halite, soil component and terrestrial Nostoc commune biofilm under Mars relevant environmental conditions. Physicochemical methods served for the determination of water sorption equilibrium data and survival of heterotrophic bacteria in biofilm samples with different water contents was assured by recultivation. Deliquescence of halite provides liquid water at temperatures <273 K and may serve as water source on Mars during themorning stabilized by the CO2 atmosphere for a few hours. The protecting biofilmof N. commune is rather hygroscopic and tends to store water at lower humidity values. Survival tests showed that a large proportion of the Alphaproteobacteria dominated microbiota associated to N. commune is very desiccation tolerant and water uptake from saturated NaCl solutions (either by direct uptake of brine or adsorption of humidity) did not enhance recultivability in long-time desiccated samples. Still, a minor part can grow under highly saline conditions.However, the salinity level, although unfavourable for the host organism,might be for parts of the heterotrophic microbiota no serious hindrance for growing in salty Mars-like environments.en
dc.description.sponsorshipBMWi, 50WB1151, Untersuchungen zum Überleben und zur Aktivität von Eisenbakterien unter Mars-ähnlichen Bedingungen auf der ISS und im Laboren
dc.identifier.eissn1475-3006
dc.identifier.issn1473-5504
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/7178
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-6453
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc570 Biowissenschaften; Biologie
dc.subject.othergeochemistryen
dc.subject.otherhaliteen
dc.subject.otherMarsen
dc.subject.othermineralogyen
dc.subject.otherNostoc communeen
dc.subject.othersmectiteen
dc.subject.othersurfaceen
dc.subject.otherwater sorptionen
dc.titleProvision of water by halite deliquescence for Nostoc commune biofilms under Mars relevant surface conditionsen
dc.typeArticle
dc.type.versionpublishedVersion
dcterms.bibliographicCitation.doi10.1017/s147355041500018x
dcterms.bibliographicCitation.issue2
dcterms.bibliographicCitation.journaltitleInternational journal of astrobiology
dcterms.bibliographicCitation.originalpublishernameCambridge University Press
dcterms.bibliographicCitation.originalpublisherplaceCambridge
dcterms.bibliographicCitation.pageend118
dcterms.bibliographicCitation.pagestart107
dcterms.bibliographicCitation.volume15
tub.accessrights.dnbdomain
tub.affiliationFak. 3 Prozesswissenschaften::Inst. Technischen Umweltschutz::FG Umweltmikrobiologiede
tub.affiliation.facultyFak. 3 Prozesswissenschaftende
tub.affiliation.groupFG Umweltmikrobiologiede
tub.affiliation.instituteInst. Technischen Umweltschutzde
tub.publisher.universityorinstitutionTechnische Universität Berlin

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