共 49 条
Formation of Cell-Iron-Mineral Aggregates by Phototrophic and Nitrate-Reducing Anaerobic Fe(II)-Oxidizing Bacteria
被引:155
作者:
Schaedler, S.
[1
]
Burkhardt, C.
[2
]
Hegler, F.
[1
]
Straub, K. L.
[1
]
Miot, J.
[3
,4
]
Benzerara, K.
[3
,4
]
Kappler, A.
[1
]
机构:
[1] Univ Tubingen, Ctr Appl Geosci, Geomicrobiol Grp, D-72076 Tubingen, Germany
[2] Univ Tubingen, Nat & Med Sci Inst NMI, D-72076 Tubingen, Germany
[3] Univ Paris 06, CNRS, UMR 7590, Inst Mineral & Phys Milieux Condenses, F-75252 Paris 05, France
[4] Univ Paris 07, CNRS, UMR 7590, Inst Mineral & Phys Milieux Condenses, F-75221 Paris 05, France
关键词:
Fe(II) oxidation;
iron-cycling;
geomicrobiology;
FERROUS IRON;
PHOTOAUTOTROPHIC BACTERIA;
OXIDIZING BACTERIA;
SAMPLE PREPARATION;
CIRCUMNEUTRAL PH;
FE(II) OXIDATION;
REDUCTION;
ENVIRONMENTS;
MANGANESE;
STRAIN;
D O I:
10.1080/01490450802660573
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
Microbial anaerobic Fe(II) oxidation at neutral pH produces poorly soluble Fe(III) which is expected to bind to cell surfaces causing cell encrustation and potentially impeding cell metabolism. The challenge for Fe(II)-oxidizing prokaryotes therefore is to avoid encrustation with Fe(III). Using different microscopic techniques we tracked Fe(III) minerals at the cell surface and within cells of phylogenetically distinct phototrophic and nitrate-reducing Fe(II)-oxidizing bacteria. While some strains successfully prevented encrustation others precipitated Fe(III) minerals at the cell surface and in the periplasm. Our results indicate differences in the cellular mechanisms of Fe(II) oxidation, transport of Fe(II)/Fe(III) ions, and Fe(III) mineral precipitation.
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页码:93 / 103
页数:11
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