ArticleProceedings of the National Academy of Sciences of the United States of America2015
Carbon monoxide as a metabolic energy source for extremely halophilic microbes: implications for microbial activity in Mars regolith.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.
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37 citing papers in PubMed, 77 citations in OpenAlex.
- Metagenomic insights into the taxonomic and metabolic diversity of the microbiome of Lake Karum in the Danakil Depression, Ethiopia.Environmental microbiome · 2026Article
- Uncovering transcriptional processes in microbial communities adapted to differing saline conditions in salt-weathered historic buildings.Microbiome · 2026Article
- Genomic Survey of Carbon Monoxide Dehydrogenases Reveals Their Widespread Distribution in Marine Habitats.Environmental microbiology reports · 2026Article
- Carbon monoxide dehydrogenase-encoding microorganisms in volcanic astrobiological analogues: an enzyme system to investigate the evolution of life.FEMS microbiology ecology · 2026Review
- Global implications of a low soil moisture threshold for microbial hydrogen uptake.Nature communications · 2025Article
- Quinone extraction drives atmospheric carbon monoxide oxidation in bacteria.Nature chemical biology · 2025Article
- Novel insights into the diversity of halophilic microorganisms and their functioning in hypersaline ecosystems.npj biodiversity · 2024Review
- Trace gas oxidation sustains energy needs of a thermophilic archaeon at suboptimal temperatures.Nature communications · 2024Article
- Microbial diversity in polyextreme salt flats and their potential applications.Environmental science and pollution research international · 2024Review
- Prevalence of trace gas-oxidizing soil bacteria increases with radial distance from Polloquere hot spring within a high-elevation Andean cold desert.The ISME journal · 2024Article
- Temperature, pH, and oxygen availability contributed to the functional differentiation of ancient Nitrososphaeria.The ISME journal · 2024Article
- Dissecting Light Sensing and Metabolic Pathways on the Millimeter Scale in High-Altitude Modern Stromatolites.Microbial ecology · 2023Article
- Perchlorate-Coupled Carbon Monoxide (CO) Oxidation byMicroorganisms · 2023Article
- Functional basis of primary succession: Traits of the pioneer microbes.Environmental microbiology · 2023Article
- Metabolic Potential of Microbial Communities in the Hypersaline Sediments of the Bonneville Salt Flats.mSystems · 2022Article
- Microbial oxidation of atmospheric trace gases.Nature reviews. Microbiology · 2022Review
- Anaerobic carboxydotrophy in sulfur-respiring haloarchaea from hypersaline lakes.The ISME journal · 2022Article
- Out of Thin Air? Astrobiology and Atmospheric Chemotrophy.Astrobiology · 2022Review
- The archaeal classFrontiers in microbiology · 2022Article
- Integrating greenhouse gas capture and C1 biotechnology: a key challenge for circular economy.Microbial biotechnology · 2022Article
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1 author at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Carbon monoxide occurs at relatively high concentrations (≥800 parts per million) in Mars' atmosphere, where it represents a potentially significant energy source that could fuel metabolism by a localized putative surface or near-surface microbiota. However, the plausibility of CO oxidation under conditions relevant for Mars in its past or at present has not been evaluated. Results from diverse terrestrial brines and saline soils provide the first documentation, to our knowledge, of active CO uptake at water potentials (-41 MPa to -117 MPa) that might occur in putative brines at recurrent slope lineae (RSL) on Mars. Results from two extremely halophilic isolates complement the field observations. Halorubrum str. BV1, isolated from the Bonneville Salt Flats, Utah (to our knowledge, the first documented extremely halophilic CO-oxidizing member of the Euryarchaeota), consumed CO in a salt-saturated medium with a water potential of -39.6 MPa; activity was reduced by only 28% relative to activity at its optimum water potential of -11 MPa. A proteobacterial isolate from hypersaline Mono Lake, California, Alkalilimnicola ehrlichii MLHE-1, also oxidized CO at low water potentials (-19 MPa), at temperatures within ranges reported for RSL, and under oxic, suboxic (0.2% oxygen), and anoxic conditions (oxygen-free with nitrate). MLHE-1 was unaffected by magnesium perchlorate or low atmospheric pressure (10 mbar). These results collectively establish the potential for microbial CO oxidation under conditions that might obtain at local scales (e.g., RSL) on contemporary Mars and at larger spatial scales earlier in Mars' history.
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