2014
DOI: 10.1016/j.procbio.2014.09.020
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Effect of carbon source and competition for electrons on nitrous oxide reduction in a mixed denitrifying microbial community

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Cited by 64 publications
(42 citation statements)
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“…Under eCO 2 , increased amounts of C released from roots (Table ) might act as an electron donor that accelerates the electron flow. Novosphingobium , therefore, may be stimulated under eCO 2 to reduce nitrate to nitrous oxide and provide more energy for microbial metabolism during the process (Ribera‐Guardia, Kassortaki, Gutierrez, & Pijuan, ). The increased abundance of Novosphingobium DNA in the 13 C‐enriched DNA fraction under eCO 2 indicated that this genus is important in the biodegradation of complex substrates and the acceleration of electron flow in the rhizosphere, and consequently contributes to changes in soil C and N cycling in response to eCO 2 .…”
Section: Discussionmentioning
confidence: 99%
“…Under eCO 2 , increased amounts of C released from roots (Table ) might act as an electron donor that accelerates the electron flow. Novosphingobium , therefore, may be stimulated under eCO 2 to reduce nitrate to nitrous oxide and provide more energy for microbial metabolism during the process (Ribera‐Guardia, Kassortaki, Gutierrez, & Pijuan, ). The increased abundance of Novosphingobium DNA in the 13 C‐enriched DNA fraction under eCO 2 indicated that this genus is important in the biodegradation of complex substrates and the acceleration of electron flow in the rhizosphere, and consequently contributes to changes in soil C and N cycling in response to eCO 2 .…”
Section: Discussionmentioning
confidence: 99%
“…Microbial PHB storage is usually the main mechanism for the removal of readily biodegradable carbon sources in wastewater systems when operating under dynamic conditions. Microbial internal storage turnovers have been demonstrated to have a significant influence on N 2 O accumulation during heterotrophic denitrification 10 11 12 17 20 21 . The utilization of the produced storage polymer might be the major contributor to N 2 O accumulation during denitrification 10 11 12 .…”
Section: Discussionmentioning
confidence: 99%
“…This was attributed to competition for limited electrons between N 2 O reductase and the previous denitrification reductases. Under this mechanism, differing N-reductase electron carrier affinities or regulatory mechanisms create an uneven distribution of electrons to the separate denitrification steps (Pan et al, 2013;Ribera-Guardia et al, 2014;Wang et al, 2018;Schalk-Otte et al, 2000). Earlier N-reductases are thought to outcompete N 2 O reductase resulting in N 2 O accumulation during limited electron supply.…”
Section: Differential Stages In N 2 O Production: the Role Of Carbonmentioning
confidence: 99%
“…Earlier N-reductases are thought to outcompete N 2 O reductase resulting in N 2 O accumulation during limited electron supply. Electron supply can be limited due to substrate availability but also carbon oxidation rates (Pan et al, 2013) which depend on the substrate being utilized (Ribera-Guardia et al, 2014) and presumably the organism carrying out the oxidation.…”
Section: Differential Stages In N 2 O Production: the Role Of Carbonmentioning
confidence: 99%