Combined nitrification-denitrification processes

Kuenen, J.C.

doi:10.1016/0168-6445(94)90107-4

Cited by 42 publications

(51 citation statements)

References 15 publications

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“…Alcaligenes, Thiosphaera, Pseudomonas spp., described by Kuenen and 357 Robertson (1994), Moir et al (1996), Daum et al (1998), Nishio et al 358 (1998)) and fungi (e.g. Ascomycota and Basidiomycota There is a need for more continuous NO flux measurements during cold 551 periods and winter/spring transition periods, in order to improve our 552 estimates of annual flux rates.…”

Section: Paracoccus 356mentioning

confidence: 99%

A review of soil NO transformation: Associated processes and possible physiological significance on organisms

Medinets

Skiba

Rennenberg

et al. 2015

Soil Biology and Biochemistry

185

106

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The NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. for atmospheric chemistry. Here we review the current knowledge on 60 processes involved in the formation and consumption of NO in soils, the 61 importance of NO for the physiological functioning of different organisms, 62 and for inter-and intra-species signalling and competition, e.g. in the 63 rooting zone between microbes and plants. We also show that prokaryotes 64 and eukaryotes are able to produce NO by multiple pathways and that 65 unspecific enzymo-oxidative mechanisms of NO production are likely to 66 occur in soils. Nitric oxide production in soils is not only linked to NO 67 production by nitrifying and denitrifying microorganisms, but also linked to 68 extracellular enzymes from a wide range of microorganisms. 69

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Section: Paracoccus 356mentioning

confidence: 99%

A review of soil NO transformation: Associated processes and possible physiological significance on organisms

Medinets

Skiba

Rennenberg

et al. 2015

Soil Biology and Biochemistry

185

106

View full text Add to dashboard Cite

show abstract

“…Although nitrification and denitrification reactions are often represented by rather simple equations, it is recognized that they may be more complex and may involve the formation of various intermediates Jetten et al, 1997;Kuenen & Robertson, 1994). The use of 15N-labelled compounds in combination with mass spectrometry can help to elucidate Previous experiments using 15N-labelled ammonium and 14N0, in an Anammox pilot plant reactor resulted in the production of 14-15N2 (van de Graaf et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Metabolic pathway of anaerobic ammonium oxidation on the basis of 15N studies in a fluidized bed reactor

et al. 1997

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A novel metabolic pathway for anaerobic ammonium oxidation with nitrite as the electron acceptor has been elucidated using 15N-labelled nitrogen compounds. These experiments showed that ammonium was biologically oxidized with hydroxylamine as the most probable electron acceptor. The hydroxylamine itself is most likely derived from nitrite. Batch experiments in which ammonium was oxidized with hydroxylamine transiently accumulated hydrazine. The conversion of hydrazine to dinitrogen gas is postulated as the reaction generating electron equivalents for the reduction of nitrite to hydroxylamine. During the conversion of ammonium, a small amount of nitrate was formed from some of the nitrite. The addition of NH,OH to an operating fluidized bed system caused a stoichiometric increase in the ammonium conversion rate (1 mmol 1-1 h-l) and a decrease in the nitrate production rate (05 mmol I-' h-l). Addition of hydrazine also caused a decrease in nitrate production. On the basis of these findings, it is postulated that the oxidation of nitrite to nitrate could provide the anaerobic ammoniumoxidizing bacteria with the reducing equivalents necessary for CO, fixation.

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“…It is thought that these bacteria could oxidize as much ammonia as the chemolithotrophic ammonia-oxidizers provided that enough organic carbon is available for energy production (Kuenen & Robertson 1994). Additionally, many heterotrophic nitrifiers reduce NO − 2 to N 2 O under microaerophilic conditions using standard denitrifying enzymes (Table 3) (Castignetti et al 1984).…”

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confidence: 99%

Production, Isotopic Composition, and Atmospheric Fate of Biologically Produced Nitrous Oxide

Stein¹

2002

Annual Review of Earth and Planetary Sciences

122

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s Abstract The anthropogenic production of greenhouse gases and their consequent effects on global climate have garnered international attention for years. A remaining challenge facing scientists is to unambiguously quantify both sources and sinks of targeted gases. Microbiological metabolism accounts for the largest source of nitrous oxide (N 2 O), mostly due to global conversion of land for agriculture and massive usage of nitrogen-based fertilizers. A most powerful method for characterizing the sources of N 2 O lies in its multi-isotope signature. This review summarizes mechanisms that lead to biological N 2 O production and how discriminate placement of 15 N into molecules of N 2 O occurs. Through direct measurements and atmospheric modeling, we can now place a constraint on the isotopic composition of biological sources of N 2 O and trace its fate in the atmosphere. This powerful interdisciplinary combination of biology and atmospheric chemistry is rapidly advancing the closure of the global N 2 O budget.

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Combined nitrification-denitrification processes

Cited by 42 publications

References 15 publications

A review of soil NO transformation: Associated processes and possible physiological significance on organisms

A review of soil NO transformation: Associated processes and possible physiological significance on organisms

Metabolic pathway of anaerobic ammonium oxidation on the basis of 15N studies in a fluidized bed reactor

Production, Isotopic Composition, and Atmospheric Fate of Biologically Produced Nitrous Oxide

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