Mechanisms of nitrite accumulation occurring in soil nitrification

Shen, Qi; Wei, Ran; Cao, Zhaoliang

doi:10.1016/s0045-6535(02)00215-1

Cited by 116 publications

(62 citation statements)

References 24 publications

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“…In these conversions, NO 2 Ϫ accumulates when its production is kinetically faster than NO 2 Ϫ consumption (9,10). Nitrite accumulation had been thought to occur rarely in the environment (11); however, recent observations suggested that NO 2 Ϫ formation can occur as a result of NO 3 Ϫ reduction and NH 4 ϩ oxidation under conditions that favor NO 2 Ϫ production over consumption (12)(13)(14)(15)(16). For example, high pH and abundance of NH 4 ϩ and hydroxylamine (NH 2 OH) affect NO 2 Ϫ oxidizers, causing NO 2 Ϫ accumulation from nitrosification (15), while oxygen intrusion and/or electron donor limitations may cause NO 2 Ϫ accumulation from denitrification (12).…”

mentioning

confidence: 99%

Nitrite Control over Dissimilatory Nitrate/Nitrite Reduction Pathways in Shewanella loihica Strain PV-4

Yoon

Sanford

Löffler

2015

Appl Environ Microbiol

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؊ as a relevant modulator of NO 3 ؊ fate in S. loihica strain PV-4, and, by extension, suggest that NO 2 ؊ is a relevant determinant for N retention (i.e., ammonification) versus N loss and greenhouse gas emission (i.e., denitrification). T wo major dissimilatory pathways determine the fate of nitrate (NO 3Ϫ ) in anoxic environments: denitrification and respiratory ammonification (1, 2). In denitrification, NO 3 Ϫ is stepwise reduced via nitrite (NO 2 Ϫ ), nitric oxide (NO), and nitrous oxide (N 2 O) to dinitrogen (N 2 ). In respiratory ammonification, NO 3 Ϫ is reduced via NO 2 Ϫ to ammonium (NH 4 ϩ ). Nitrite is the common intermediate of the two pathways and the branching point for both dissimilatory pathways. In the presence of NH 4 ϩ , NO 2 Ϫ also can serve as the electron acceptor for anaerobic ammonium oxidation (anammox) (3); however, in soil environments this process appears to be less relevant than the other two processes (4). The fate of NO 2 Ϫ via denitrification or respiratory ammonification has great environmental impact. Denitrification forms gaseous products (N 2 O, N 2 ), which are emitted from the soil, resulting in N loss, whereas respiratory ammonification generates NH 4 ϩ leading to N retention (5, 6). Atmospheric N 2 O is a potent greenhouse gas and an ozone-depleting agent (7,8). Therefore, knowledge of the environmental factors that control these NO 2 Ϫ reduction pathways is needed to estimate, predict, and possibly manipulate N loss versus N retention.The major sources of NO 2 Ϫ in the environment include NH 4 ϩ oxidation performed by nitrosifiers and NO 3 Ϫ reduction. In these conversions, NO 2 Ϫ accumulates when its production is kinetically faster than NO 2 Ϫ consumption (9, 10). Nitrite accumulation had been thought to occur rarely in the environment (11); however, recent observations suggested that NO 2 Ϫ formation can occur as a result of NO 3 Ϫ reduction and NH 4 ϩ oxidation under conditions that favor NO 2 Ϫ production over consumption (12)(13)(14)(15)(16). For example, high pH and abundance of NH 4 ϩ and hydroxylamine (NH 2 OH) affect NO 2 Ϫ oxidizers, causing NO 2 Ϫ accumulation from nitrosification (15), while oxygen intrusion and/or electron donor limitations may cause NO 2 Ϫ accumulation from denitrification (12). In pure-culture studies, several denitrifiers and respiratory ammonifiers were found to reduce NO 3 Ϫ at a higher rate than NO 2 Ϫ , causing dynamic changes of the NO 2 Ϫ :NO 3 Ϫ ratios in the medium (10). Additional NO 2 Ϫ may be generated by NO 3 Ϫ -to-NO 2 Ϫ reducers sensu stricto, which generate NO 2 Ϫ as an end product (12). For example, in activated sludge, the activity of NO 3 Ϫ -to-NO 2 Ϫ reducers leads to NO 2 Ϫ formation; however, the contribution of NO 3 Ϫ -to-NO 2 Ϫ reducers to NO 2 Ϫ accumulation in natural environments is uncertain (17,18).Even though NO 2 Ϫ formation occurs in diverse environments (12,19), information regarding the impact of NO 2 Ϫ on dissimilatory NO 3 Ϫ /NO 2 Ϫ reduction pathways is scarce. Increased NO 2 Ϫ concentrations and respi...

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confidence: 99%

Nitrite Control over Dissimilatory Nitrate/Nitrite Reduction Pathways in Shewanella loihica Strain PV-4

Yoon

Sanford

Löffler

2015

Appl Environ Microbiol

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“…The process of nitrification is mostly well coupled in natural environments as NO 2 Ϫ rarely accumulates (5,6). However, environmental fluctuations and stresses can result in uncoupling and NO 2 Ϫ accumulation (7,8), which may lead to production of N 2 O, a potent greenhouse gas, and a reduction in nitrogen use efficiency by agricultural crops (9). Considering the wide variety of proteobacteria involved in nitrification, bacterial cell-cell signaling or quorum sensing (QS) via N-acyl-homoserine lactones (acyl-HSLs) may be one mechanism that contributes to coupling and maintaining efficient nitrification between nitrifying bacteria (10)(11)(12).…”

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Nitrite-Oxidizing Bacterium Nitrobacter winogradskyi Produces N -Acyl-Homoserine Lactone Autoinducers

Mellbye

Bottomley

Sayavedra-Soto

2015

Appl Environ Microbiol

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bNitrobacter winogradskyi is a chemolithotrophic bacterium that plays a role in the nitrogen cycle by oxidizing nitrite to nitrate. Here, we demonstrate a functional N-acyl-homoserine lactone (acyl-HSL) synthase in this bacterium. The N. winogradskyi genome contains genes encoding a putative acyl-HSL autoinducer synthase (nwi0626, nwiI) and a putative acyl-HSL autoinducer receptor (nwi0627, nwiR) with amino acid sequences 38 to 78% identical to those in Rhodopseudomonas palustris and other Rhizobiales. Expression of nwiI and nwiR correlated with acyl-HSL production during culture. N. winogradskyi produces two distinct acyl-HSLs, N-decanoyl-L-homoserine lactone (C 10 -HSL) and a monounsaturated acyl-HSL (C 10:1 -HSL), in a cell-densityand growth phase-dependent manner, during batch and chemostat culture. The acyl-HSLs were detected by bioassay and identified by ultraperformance liquid chromatography with information-dependent acquisition mass spectrometry (UPLC-IDA-MS). The C‫؍‬C bond in C 10:1 -HSL was confirmed by conversion into bromohydrin and detection by UPLC-IDA-MS.

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“…However, it has been estimated that 50-70% of this N is lost (Hodge et al, 2000). Nitrate leaching is considered to be one of the most important mechanisms of N losses from soils (Shen et al, 2003), with consequence of the low fertilizer-N uptake efficiency (NUE), and also contributes to nitrate pollution of groundwater (Lyle & Richard, 1997;Xing & Zhu, 2000;Li et al, 2003;Camargo & Alonso, 2006). For economic and ecological reasons, an increase in NUE continues to be the main objective of N-related research (Hirel et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Use of Nitrification Inhibitor DMPP to Improve Nitrogen Uptake Efficiency in Citrus Trees

Martínez‐Alcántara¹,

Quiñones²,

Polo³

et al. 2013

JAS

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In citrus orchards, nitrogen uptake efficiency (NUE) is between 40 to 60% where any excess of nitrate is subjected to leaching below the rooting zone. The compound, 3,4-dimethylpyrazole phosphate (DMPP) inhibits the nitrification process in soil thus reducing/delaying nitrate leaching. The objective of this study was to evaluate the performance of DMPP added to ammonium sulphate (AS+DMPP), compared to ammonium sulphate (AS) and calcium-potassium nitrate (CPN), in fertigation of bearing orange trees grown outdoors in drainage lysimeters. Fertilizers were 15 N-labeled to trace N through soil-plant-drainage system. Soil was sampled monthly from April to December and trees were destructively harvested in December. In trees fertilized with AS+DMPP, increased biomass was observed with a more profuse development of root system and higher fruit yield. Fertilizer 15 N uptake significantly increased with DMPP addition. In AS+DMPP amended soils, increased values of NH -15 N and lower NO -N concentrations were recorded from April to June as evidence of the inhibitory effect of DMPP on the nitrification process during this period. In CPN and AS fertilized soils, 15 N losses in drainage solutions represented 9-10% of the fertilizer supplied whereas less than 3% was leached when DMPP was added. At the end of the cycle, highest NUE was recorded in the AS+DMPP treatment (69%), while CPN and AS had lower values (61% and 54%, respectively). Therefore, the use of DMPP enables a more efficient utilization of the fertilizer-N in citrus trees, minimizing the risk of nitrate-N pollution in groundwater. However, DMPP supply should be considered during spring fertilization, since high temperatures of summer months significantly reduced its activity.

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Mechanisms of nitrite accumulation occurring in soil nitrification

Cited by 116 publications

References 24 publications

Nitrite Control over Dissimilatory Nitrate/Nitrite Reduction Pathways in Shewanella loihica Strain PV-4

Nitrite Control over Dissimilatory Nitrate/Nitrite Reduction Pathways in Shewanella loihica Strain PV-4

Nitrite-Oxidizing Bacterium Nitrobacter winogradskyi Produces N -Acyl-Homoserine Lactone Autoinducers

Use of Nitrification Inhibitor DMPP to Improve Nitrogen Uptake Efficiency in Citrus Trees

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