Search: id:"swepub:oai:research.chalmers.se:56aa356d-0fc9-4ea3-8925-21c1ffdafa24" >
Preservation of und...
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Fernández-Remolar, David C.Macau University of Science and Technology
(author)
Preservation of underground microbial diversity in ancient subsurface deposits (>6 ma) of the rio tinto basement
- Article/chapterEnglish2021
Publisher, publication year, extent ...
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2021-07-27
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MDPI AG,2021
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:research.chalmers.se:56aa356d-0fc9-4ea3-8925-21c1ffdafa24
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https://doi.org/10.3390/microorganisms9081592DOI
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https://research.chalmers.se/publication/525200URI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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The drilling of the Rio Tinto basement has provided evidence of an underground microbial community primarily sustained by the Fe and S metabolism through the biooxidation of pyrite orebodies. Although the gossan is the microbial activity product, which dates back to the Oligocene (25 Ma), no molecular evidence of such activity in the past has been reported yet. A Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS) molecular analysis of a subsurface sample in the Peña de Hierro basement has provided novel data of the ancient underground microbial community. It shows that the microbial remains are preserved in a mineral matrix composed of laminated Fe-oxysulfates and K-and Na-bearing sulfates alternating with secondary silica. In such a mineral substrate, the biomolecule traces are found in five different microstructure associations, (1) <15 micron-sized nodular microstructures composed of POn(2≤n≤4)−, (2) <30 micron-size mi-cronodules containing fatty acids, acylglycerides, and alkanol chains, (3) <20 micro-sized nodules containing NOn −(2≤n≤3) ions, (4) 40-micron size nodules with NH4+ and traces of peptides, and (5) >200-micron thick layer with N-bearing adducts, and sphingolipid and/or peptide traces. It suggests the mineralization of at least five microbial preserved entities with different metabolic ca-pabilities, including: (1) Acidiphilium/Tessaracoccus-like phosphate mineralizers, (2) microbial patches preserving phosphate-free acylglycerides bacteria, (3) nitrogen oxidizing bacteria (e.g., Acidovorax sp.), (4) traces of heterotrophic ammonifying bacteria, and (5) sphingolipid bearing bacteria (e.g., Sphin-gomonadales, and δ-Proteobacteria) and/or mineralized biofilms. The primary biooxidation process acted as a preservation mechanism to release the inorganic ions that ultimately mineralized the microbial structures.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Gómez-Ortiz, DavidUniversidad Rey Juan Carlos,Rey Juan Carlos University
(author)
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Malmberg, Per,1974Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malmper
(author)
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Huang, TingMacau University of Science and Technology
(author)
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Shen, YanMacau University of Science and Technology
(author)
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Anglés, Angélica
(author)
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Amils, R. I.Universidad Autonoma de Madrid (UAM),Centro de Astrobiologia (CAB)
(author)
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Macau University of Science and TechnologyUniversidad Rey Juan Carlos
(creator_code:org_t)
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In:Microorganisms: MDPI AG9:82076-2607
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