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Geobiology. 2009 Jan;7(1):21-4. doi: 10.1111/j.1472-4669.2008.00185.x.

Phototrophic Fe(II) oxidation in an atmosphere of H2: implications for Archean banded iron formations.

Author information

1
Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Abstract

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.

PMID:
19200143
PMCID:
PMC2763526
DOI:
10.1111/j.1472-4669.2008.00185.x
[Indexed for MEDLINE]
Free PMC Article

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