Publikationsdatum:
2003-11-08
Beschreibung:
The Viking missions showed the martian soil to be lifeless and depleted in organic material and indicated the presence of one or more reactive oxidants. Here we report the presence of Mars-like soils in the extreme arid region of the Atacama Desert. Samples from this region had organic species only at trace levels and extremely low levels of culturable bacteria. Two samples from the extreme arid region were tested for DNA and none was recovered. Incubation experiments, patterned after the Viking labeled-release experiment but with separate biological and nonbiological isomers, show active decomposition of organic species in these soils by nonbiological processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Navarro-Gonzalez, Rafael -- Rainey, Fred A -- Molina, Paola -- Bagaley, Danielle R -- Hollen, Becky J -- de la Rosa, Jose -- Small, Alanna M -- Quinn, Richard C -- Grunthaner, Frank J -- Caceres, Luis -- Gomez-Silva, Benito -- McKay, Christopher P -- New York, N.Y. -- Science. 2003 Nov 7;302(5647):1018-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratorio de Quimica de Plasmas y Estudios Planetarios, Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Circuito Exterior, Ciudad Universitaria, Apartado Postal 70-543, Mexico City, 04510, Mexico.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14605363" target="_blank"〉PubMed〈/a〉
Schlagwort(e):
Air Microbiology
;
Alanine/chemistry/metabolism
;
Bacteria/classification/*growth & development/isolation & purification/metabolism
;
Benzene/analysis
;
Biodiversity
;
Chile
;
Colony Count, Microbial
;
DNA, Bacterial/analysis/genetics
;
*Desert Climate
;
Formates/analysis/chemistry/metabolism
;
Gas Chromatography-Mass Spectrometry
;
Genes, rRNA
;
Glucose/chemistry/metabolism
;
Mars
;
Organic Chemicals/analysis
;
Oxidation-Reduction
;
Photochemistry
;
Polymerase Chain Reaction
;
*Soil Microbiology
;
Stereoisomerism
;
Temperature
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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