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

被引：33

作者：

Croal, L. R. ^{[1
]}

Jiao, Y. ^{[4
]}

Kappler, A. ^{[5
]}

Newman, D. K. ^{[1
,2
,3
]}

机构：

[1] MIT, Dept Biol, Cambridge, MA 02139 USA

[2] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

[3] MIT, Howard Hughes Med Inst, Cambridge, MA 02139 USA

[4] Lawrence Livermore Natl Lab, Biol & Biosci Div, Phys & Life Sci Directorate, Livermore, CA 94550 USA

[5] Univ Tubingen, Ctr Appl Geosci, Tubingen, Germany

来源：

GEOBIOLOGY | 2009年 / 7卷 / 01期

关键词：

GEOCHEMISTRY; EVOLUTION; BACTERIA; OPERON; EARTH;

D O I：

10.1111/j.1472-4669.2008.00185.x

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：21 / 24

页数：4

共 30 条

[1] Biogenic methane, hydrogen escape, and the irreversible oxidation of early Earth [J].