Phototrophic Fe(II) oxidation in an atmosphere of H2: implications for Archean banded iron formations
| Autor: | Dianne K. Newman, Laura R. Croal, Yongqin Jiao, Andreas Kappler |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
biology
Phototroph Hydrogen Atmosphere Chemistry Archean Bicarbonate Inorganic chemistry chemistry.chemical_element Photosynthesis biology.organism_classification Archaea Purple bacteria Article chemistry.chemical_compound Proteobacteria General Earth and Planetary Sciences Banded iron formation Ferrous Compounds Oxidation-Reduction Ecology Evolution Behavior and Systematics General Environmental Science |
| Zdroj: | Geobiology. 7:21-24 |
| ISSN: | 1472-4669 1472-4677 |
| DOI: | 10.1111/j.1472-4669.2008.00185.x |
| Popis: | The effect of hydrogen on the rate of phototrophic Fe(II) oxidation by two species of purple bacteria was measured at two different bicarbonate concentrations. Hydrogen slowed Fe(II) oxidation to varying degrees depending on the bicarbonate concentration, but even the slowest rate of Fe(II) oxidation remained on the same order of magnitude as that estimated to have been necessary to deposit the Hamersley banded iron formations. Given the hydrogen and bicarbonate concentrations inferred for the Archean, our data suggest that Fe(II) phototrophy could have been a viable process at this time. |
| Databáze: | OpenAIRE |
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