Sulphate reduction in oxic and sub-oxic North-East Atlantic sediments

Battersby, N.S.; Malcolm, S.J.; Brown, C. M.; Stanley, S. O.

doi:10.1111/j.1574-6968.1985.tb01153.x

Cited by 34 publications

(8 citation statements)

References 18 publications

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“…Although growth of SRB requires anaerobic conditions, SRB are active in or near oxic-anoxic transition zones in marine and fresh water sediments (Battersby et al, 1985) and in microbial mats (Canfield and Desmarais, 1991), where sulfate may be regenerated by the oxidation of hydrogen sulfide (Widdel and Hansen, 1992;Johnson et al, 1997). Oxygen inhibits central redox proteins (Stams and Hansen, 1982;Cammack et al, 1994;Dolla et al, 2006) and cell division (Sass et al, 1998;Cypionka, 2000) in the SRB and generates reactive oxygen species (ROS) (Imlay, 2003;Dolla et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Contribution of rubredoxin:oxygen oxidoreductases and hybrid cluster proteins of Desulfovibrio vulgarisHildenborough to survival under oxygen and nitrite stress

Yurkiw

Voordouw

2012

Environmental Microbiology

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A genomic island (GEI) of the sulfate-reducing bacterium Desulfovibrio vulgaris Hildenborough, found to be able to migrate between two tRNA-Met loci of the genome, contains genes for rubredoxin:oxygen oxidoreductase-1 (roo1) and hybrid cluster protein-1 (hcp1) with additional copies for these genes (roo2 and hcp2) being found elsewhere on the chromosome. A suite of mutants was created in which roo2 and/or hcp2 and/or the GEI were either present or missing. The GEI and roo2 increased survival under microaerobic conditions and allowed growth in closer proximity to the air-water interface of soft agar tubes, two properties which appeared to be closely linked. When Hcp2(+) GEI(+) or Hcp2(-) GEI(+) cells, harbouring cytochrome c nitrite reductase (NrfHA) and growing on lactate and sulfate, were amended with 10 mM nitrite at mid-log phase (8-10 mM sulfide), all nitrite was reduced within 30 h with a rate of 3.0 mmol (g biomass)(-1) h(-1) after which sulfate reduction resumed. However, Hcp2(+) GEI(-) or Hcp2(-) GEI(-) cells were unable to use lactate, causing sulfide to be used as electron donor for nitrite reduction at a sixfold lower rate. Complementation studies indicated that hcp1, not roo1, enhanced the rate of nitrite reduction under these conditions. Hcp2 enhanced the rate of nitrite reduction when, in addition to lactate, hydrogen was also present as an electron donor. These results indicate a critical role of Hcps in alleviating nitrite stress in D. vulgaris Hildenborough by maintaining the integrity of electron transport chains from lactate or H(2) to NrfHA through removal of reactive nitrogen species. It thus appears that the GEI contributes considerably to the fitness of the organism, allowing improved growth in microaerobic environments found in sulfide-oxygen gradients and in environments, containing both sulfide and nitrite, through the action of Roo1 and Hcp1 respectively.

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Section: Introductionmentioning

confidence: 99%

Contribution of rubredoxin:oxygen oxidoreductases and hybrid cluster proteins of Desulfovibrio vulgarisHildenborough to survival under oxygen and nitrite stress

Yurkiw

Voordouw

2012

Environmental Microbiology

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“…In particular, sulfate‐reducers were isolated from oxic environments close to anoxic or periodically anoxic zones (e.g. [4–6]). Also, these bacteria were shown to produce ATP in the presence of oxygen (e.g.…”

Section: Introductionmentioning

confidence: 99%

The ‘strict’ anaerobe Desulfovibrio gigas contains a membrane‐bound oxygen‐reducing respiratory chain

et al. 2001

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Sulfate-reducing bacteria are considered as strict anaerobic microorganisms, in spite of the fact that some strains have been shown to tolerate the transient presence of dioxygen. This report shows that membranes from Desulfovibrio gigas grown in fumarate/sulfate contain a respiratory chain fully competent to reduce dioxygen to water. In particular, a membrane-bound terminal oxygen reductase, of the cytochrome bd family, was isolated, characterized, and shown to completely reduce oxygen to water. This oxidase has two subunits with apparent molecular masses of 40 and 29 kDa. Using NADH or succinate as electron donors, the oxygen respiratory rates of D. gigas membranes are comparable to those of aerobic organisms (3.2 and 29 nmol O 2 min 31 mg protein 31 , respectively). This strict anaerobic' bacterium contains all the necessary enzymatic complexes to live aerobically, showing that the relationships between oxygen and anaerobes are much more complex than originally thought. ß 2001 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies.

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“…A number of sulfate-reducing bacteria (SRB) have been detected in oxic surface sediments of various aquatic environments where the E h values were higher than those for sulfate reduction; e.g. marine coastal sediments [1,2], oceanic sediments [3] and freshwater sediments [4][5][6]. Also, some types of SRB were enriched and isolated from strongly oxidized open sea [7] and from well aerated activated sludge and oxic marine muds [8].…”

Section: Introductionmentioning

confidence: 99%

Survival of sulfate-reducing bacteria in oxic surface sediment of a seawater lake

Fukui

Takii

1990

FEMS Microbiology Letters

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Microhabitats and survival of sulfate‐reducing bacteria (SRB) in an oxic surface sediment of a seawater lake were examined. The size of fractionation of the sediment suspension showed that most of SRB were associated with sediment particles larger than 10 μm. The D values (time in h required to destroy 90% of the initial viable population) for SRB in the whole sediment suspension and for SRB i n the < μ m and the < 5 μ m fractions were, respectively, 23.7, 10 and 4 when the SRB were exposed to air. Survival of the FeS‐associated Desulfovibrio desulfuricans (D value, 9.3) was higher than that of the free‐living ones (D value, 1.8). These results show that particle‐associated SRB are more protected against oxygen than free‐living ones in oxic sediments.

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Sulphate reduction in oxic and sub-oxic North-East Atlantic sediments

Cited by 34 publications

References 18 publications

Contribution of rubredoxin:oxygen oxidoreductases and hybrid cluster proteins of Desulfovibrio vulgarisHildenborough to survival under oxygen and nitrite stress

Contribution of rubredoxin:oxygen oxidoreductases and hybrid cluster proteins of Desulfovibrio vulgarisHildenborough to survival under oxygen and nitrite stress

The ‘strict’ anaerobe Desulfovibrio gigas contains a membrane‐bound oxygen‐reducing respiratory chain

Survival of sulfate-reducing bacteria in oxic surface sediment of a seawater lake

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