Arid
DOI10.1017/S147355041500018X
Provision of water by halite deliquescence for Nostoc commune biofilms under Mars relevant surface conditions
Jaenchen, Jochen1; Feyh, Nina2; Szewzyk, Ulrich2; de Vera, Jean-Pierre P.3
通讯作者Jaenchen, Jochen
来源期刊INTERNATIONAL JOURNAL OF ASTROBIOLOGY
ISSN1473-5504
EISSN1475-3006
出版年2016
卷号15期号:2页码:107-118
英文摘要

Motivated 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 the morning stabilized by the CO2 atmosphere for a few hours. The protecting biofilm of 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.


英文关键词geochemistry halite Mars mineralogy Nostoc commune smectite surface water sorption
类型Article
语种英语
国家Germany
收录类别SCI-E
WOS记录号WOS:000371710100002
WOS关键词RIBOSOMAL-RNA SEQUENCES ; ATACAMA DESERT ; LIQUID WATER ; EXTRACELLULAR POLYSACCHARIDES ; SALT STRESS ; CYANOBACTERIA ; DIVERSITY ; PHOTOSYNTHESIS ; DESICCATION ; TOLERANCE
WOS类目Astronomy & Astrophysics ; Biology ; Geosciences, Multidisciplinary
WOS研究方向Astronomy & Astrophysics ; Life Sciences & Biomedicine - Other Topics ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/193681
作者单位1.TH Wildau Tech Univ Appl Sci, Hochschulring 1, D-15745 Wildau, Germany;
2.TU Berlin, Inst Environm Technol Environm Microbiol, Ernst Reuter Pl 1, D-10587 Berlin, Germany;
3.DLR Inst Planetary Res, Rutherfordstr 2, D-12489 Berlin, Germany
推荐引用方式
GB/T 7714
Jaenchen, Jochen,Feyh, Nina,Szewzyk, Ulrich,et al. Provision of water by halite deliquescence for Nostoc commune biofilms under Mars relevant surface conditions[J],2016,15(2):107-118.
APA Jaenchen, Jochen,Feyh, Nina,Szewzyk, Ulrich,&de Vera, Jean-Pierre P..(2016).Provision of water by halite deliquescence for Nostoc commune biofilms under Mars relevant surface conditions.INTERNATIONAL JOURNAL OF ASTROBIOLOGY,15(2),107-118.
MLA Jaenchen, Jochen,et al."Provision of water by halite deliquescence for Nostoc commune biofilms under Mars relevant surface conditions".INTERNATIONAL JOURNAL OF ASTROBIOLOGY 15.2(2016):107-118.
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