Concentration and transport of nitrate by the mat-forming sulphur bacterium 
Thioploca

Fossing, H.; Gallardo, VA; Jørgensen, Bo Barker; Huettel, Markus; Nielsen, LP; Schulz, H. D.; Canfield, Donald E.; Forster , S.; Glud, Ronnie Nohr; Gundersen, Jens Kristian; Küver, Jan; Ramsing, N.B.; Teske, Andreas; Thamdrup, B.; Ulloa, O

doi:10.1038/374713a0

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Concentration and transport of nitrate by the mat-forming sulphur bacterium Thioploca

MPS-Authors

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Jørgensen, Bo Barker
Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Huettel, Markus
Flux Group, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Schulz, H. D.
Ecophysiology Group, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Canfield, Donald E.
Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society;

Forster , S.
Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Glud, Ronnie Nohr
Permanent Research Group Microsensor, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Gundersen, Jens Kristian
Permanent Research Group Microsensor, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Küver, Jan
Department of Microbiology, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Ramsing, N.B.
Department of Molecular Ecology, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Teske, Andreas
Department of Molecular Ecology, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Thamdrup, B.
Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society;

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引用

Fossing, H., Gallardo, V., Jørgensen, B. B., Huettel, M., Nielsen, L., Schulz, H. D., Canfield, D. E., Forster, S., Glud, R. N., Gundersen, J. K., Küver, J., Ramsing, N., Teske, A., Thamdrup, B., & Ulloa, O. (1995). Concentration and transport of nitrate by the mat-forming sulphur bacterium Thioploca. Nature, 374(6524), 713-715. doi:10.1038/374713a0.

引用: https://hdl.handle.net/21.11116/0000-0004-A7D7-D

要旨

MARINE species of Thioploca occur over 3,000 km along the continental shelf off Southern Peru and North and Central Chile(1-4). These filamentous bacteria live in bundles surrounded by a common sheath and form thick mats on the sea floor under the oxygen-minimum zone in the upwelling region, at between 40 and 280 m water depth. The metabolism of this marine bacterium(5,6) remained a mystery until long after its discovery(1,7). We report here that Thioploca cells are able to concentrate nitrate to up to 500 mM in a liquid vacuole that occupies >80% of the cell volume. Gliding filaments transport this nitrate 5-10 cm down into the sediment and reduce it, with concomitant oxidation of hydrogen sulphide, thereby coupling the nitrogen and sulphur cycles in the sediment.