Electrobiocorrosion by microbes without outer‐surface cytochromes

Holmes, Dawn E.; Woodard, Trevor L.; Smith, Jessica A.; Musat, Florin; Lovley, Derek R.

doi:10.1002/mlf2.12111

Cited by 5 publications

(5 citation statements)

References 62 publications

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“…Microbes capable of this 'electrobiocorrosion' (2) include Geobacter (4,5) , Shewanella (6,7), Methanosarcina (8,9), Methanothrix (9), and Sporomusa (9) species. Known electron acceptors for electrobiocorrosion are nitrate, Fe(III), and carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

“…A diversity of microbes can establish electrical contacts with Fe 0 , directly accepting electrons derived from Fe 0 oxidation to support anaerobic respiration. Microbes capable of this ‘electrobiocorrosion’ (2) include Geobacter (4, 5), Shewanella (6, 7), Methanosarcina (8, 9), Methanothrix (9), and Sporomusa (9) species. Known electron acceptors for electrobiocorrosion are nitrate, Fe(III), and carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

“…This result demonstrated that D. vulgaris relied on H 2 as an intermediary electron carrier between Fe 0 and cells and was incapable of electrobiocorrosion when only Fe 0 was available as the electron donor and energy source. However, some methanogens are only effective in electrobiocorrosion when they are metabolizing an additional energy source as they oxidize Fe 0 (8, 9). The possibility that D. vulgaris might also directly accept electrons from Fe 0 in the presence of an additional energy source was not previously evaluated (35).…”

Section: Introductionmentioning

confidence: 99%

“…The copyright holder for this preprint this version posted March 24, 2024. ; https://doi.org/10.1101/2024.03.24.586472 doi: bioRxiv preprint available as the electron donor and energy source. However, some methanogens are only effective in electrobiocorrosion when they are metabolizing an additional energy source as they oxidize Fe 0 (8,9). The possibility that D. vulgaris might also directly accept electrons from Fe 0 in the presence of an additional energy source was not previously evaluated (35).…”

Section: Introductionmentioning

confidence: 99%

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Elucidating Microbial Iron Corrosion Mechanisms with a Hydrogenase-Deficient Strain ofDesulfovibrio vulgaris

Wang,

Ueki,

et al. 2024

Preprint

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Sulfate-reducing microorganisms extensively contribute to the corrosion of ferrous metal infrastructure. There is substantial debate over their corrosion mechanisms. We investigated Fe0 corrosion with Desulfovibrio vulgaris, the sulfate reducer most often employed in corrosion studies. Cultures were grown with both lactate and Fe0 as potential electron donors to replicate the common environmental condition in which organic substrates help fuel the growth of corrosive microbes. Fe0 was corroded in cultures of a D. vulgaris hydrogenase-deficient mutant with the 1:1 correspondence between Fe0 loss and H2 accumulation expected for Fe0 oxidation coupled to H+ reduction to H2. This result and the extent of sulfate reduction indicated that D. vulgaris was not capable of direct Fe0-to-microbe electron transfer even though it was provided with a supplementary energy source in the presence of abundant ferrous sulfide. Corrosion in the hydrogenase-deficient mutant cultures was greater than in sterile controls, demonstrating the H2 removal was not necessary for the enhanced corrosion observed in the presence of microbes. The parental H2-consuming strain corroded more Fe0 than the mutant strain, which could be attributed to H2 oxidation coupled to sulfate reduction producing sulfide that further stimulated Fe0 oxidation. The results suggest that H2 consumption is not necessary for microbially enhanced corrosion, but H2 oxidation can indirectly promote corrosion by increasing sulfide generation from sulfate reduction. The finding that, D. vulgaris was incapable of direct electron uptake from Fe0 reaffirms that direct metal-to-microbe electron transfer has yet to be rigorously described in sulfate-reducing microbes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elucidating Microbial Iron Corrosion Mechanisms with a Hydrogenase-Deficient Strain ofDesulfovibrio vulgaris

Wang,

Ueki,

et al. 2024

Preprint

Self Cite

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“…A diversity of microbes can establish electrical contacts with Fe 0 , directly accepting electrons derived from Fe 0 oxidation to support anaerobic respiration. Microbes capable of this “electrobiocorrosion” 2 include Geobacter 4 , 5 , Shewanella 6 , 7 , Methanosarcina 8 , 9 , Methanothrix 9 , and Sporomusa 9 species. Known electron acceptors for electrobiocorrosion are nitrate, Fe(III), and carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Elucidating microbial iron corrosion mechanisms with a hydrogenase‐deficient strain of Desulfovibrio vulgaris

Wang,

Ueki,

et al. 2024

mLife

Self Cite

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Sulfate‐reducing microorganisms extensively contribute to the corrosion of ferrous metal infrastructure. There is substantial debate over their corrosion mechanisms. We investigated Fe0 corrosion with Desulfovibrio vulgaris, the sulfate reducer most often employed in corrosion studies. Cultures were grown with both lactate and Fe0 as potential electron donors to replicate the common environmental condition in which organic substrates help fuel the growth of corrosive microbes. Fe0 was corroded in cultures of a D. vulgaris hydrogenase‐deficient mutant with the 1:1 correspondence between Fe0 loss and H2 accumulation expected for Fe0 oxidation coupled to H+ reduction to H2. This result and the extent of sulfate reduction indicated that D. vulgaris was not capable of direct Fe0‐to‐microbe electron transfer even though it was provided with a supplementary energy source in the presence of abundant ferrous sulfide. Corrosion in the hydrogenase‐deficient mutant cultures was greater than in sterile controls, demonstrating that H2 removal was not necessary for the enhanced corrosion observed in the presence of microbes. The parental H2‐consuming strain corroded more Fe0 than the mutant strain, which could be attributed to H2 oxidation coupled to sulfate reduction, producing sulfide that further stimulated Fe0 oxidation. The results suggest that H2 consumption is not necessary for microbially enhanced corrosion, but H2 oxidation can indirectly promote corrosion by increasing sulfide generation from sulfate reduction. The finding that D. vulgaris was incapable of direct electron uptake from Fe0 reaffirms that direct metal‐to‐microbe electron transfer has yet to be rigorously described in sulfate‐reducing microbes.

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Advances in microbial community, mechanisms and stimulation effects of direct interspecies electron transfer in anaerobic digestion

Akram,

Song,

El Mashad

et al. 2024

Biotechnology Advances

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Electrobiocorrosion by microbes without outer‐surface cytochromes

Cited by 5 publications

References 62 publications

Elucidating Microbial Iron Corrosion Mechanisms with a Hydrogenase-Deficient Strain ofDesulfovibrio vulgaris

Elucidating Microbial Iron Corrosion Mechanisms with a Hydrogenase-Deficient Strain ofDesulfovibrio vulgaris

Elucidating microbial iron corrosion mechanisms with a hydrogenase‐deficient strain of Desulfovibrio vulgaris

Advances in microbial community, mechanisms and stimulation effects of direct interspecies electron transfer in anaerobic digestion

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