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Article Abstract
The hyperarid Dalangtan Playa in the western Qaidam Basin, northwestern China, is a unique terrestrial analog of Mars. Despite the polyextreme environments of this area, habitats below translucent rocks capable of environmental buffering could serve as refuges for microbial life. In this study, the hybrid assembly of Illumina short reads and Nanopore long reads recovered high-quality and high-continuity genomes, allowing for high-accuracy analysis and a deeper understanding of extremophiles in the sheltered soils of the Dalangtan Playa. Our findings reveal self-supporting and metabolically versatile sheltered soil communities adapted to a hyperarid and hypersaline playa, which provides implications for the search for life signals on Mars.
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| http://dx.doi.org/10.1128/aem.01072-23 | DOI Listing |
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Metabolic versatility of soil microbial communities below the rocks of the hyperarid Dalangtan Playa.
Appl Environ Microbiol
November 2023
Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences , Beijing, China.
The hyperarid Dalangtan Playa in the western Qaidam Basin, northwestern China, is a unique terrestrial analog of Mars. Despite the polyextreme environments of this area, habitats below translucent rocks capable of environmental buffering could serve as refuges for microbial life. In this study, the hybrid assembly of Illumina short reads and Nanopore long reads recovered high-quality and high-continuity genomes, allowing for high-accuracy analysis and a deeper understanding of extremophiles in the sheltered soils of the Dalangtan Playa.
View Article and Find Full Text PDFsp. nov., a moderate halophile isolated from hypersaline sediments of the Qaidam Basin in Northwest China.
Int J Syst Evol Microbiol
August 2022
Centro de Biología Molecular "Severo Ochoa" (UAM-CSIC), Madrid, Spain.
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Astrobiology
October 2018
5 Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China .
Based on a field expedition to the Dalangtan (DLT) saline playa located in a hyperarid region (Qaidam Basin) on the Tibet Plateau and follow-up investigations, we report the mineralogy and geochemistry of the salt layers in two vertical stratigraphic cross sections in the DLT playa. Na-, Ca-, Mg-, KCaMg-sulfates; Na-, K-, KMg-chlorides; mixed (K, Mg)-chloride-sulfate; and chlorate and perchlorate were identified in the collected samples. This mineral assemblage represents the last-stage precipitation products from Na-K-Mg-Ca-Cl-SO brine and the oxychlorine formation from photochemistry reaction similar to other hyperarid regions on Earth.
View Article and Find Full Text PDFDalangtan Saline Playa in a Hyperarid Region of Tibet Plateau: III. Correlated Multiscale Surface Mineralogy and Geochemistry Survey.
Astrobiology
October 2018
6 Institute of Mineral Resources, Chinese Academy of Geological Sciences, Key Lab of Saline Lake Resources and Enviornments, Ministry of Lands and Resources, Beijing, China .
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View Article and Find Full Text PDFDalangtan Playa (Qaidam Basin, NW China): Its microbial life and physicochemical characteristics and their astrobiological implications.
PLoS One
January 2019
Space Science Institute, Macau University of Science and Technology, Macau, China.
Dalangtan Playa is the second largest salt playa in the Qaidam Basin, north-western China. The hyper saline deposition, extremely arid climate and high UV radiation make Dalangtan a Mars analogue both for geomorphology and life preservation. To better understand microbial life at Dalangtan, both culture-dependent and culture-independent methods were examined and simultaneously, environment conditions and the evaporitic mineral assemblages were investigated.
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