Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1017/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
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ISSN | 1473-5504 |
EISSN | 1475-3006 |
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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