The Effects of Quinone Imine, a New Potent Nitrification Inhibitor, Dicyandiamide, and Nitrapyrin on Target and Off-Target Soil Microbiota

Papadopoulou, Evangelia S.; Bachtsevani, Eleftheria; Papazlatani, Christina V.; Rousidou, Constantina; Brouziotis, Antonios; Lampronikou, Eleni; Tsiknia, Myrto; Vasileiadis, Sotirios; Ipsilantis, Ioannis; Menkissoglu‐Spiroudi, Urania; Ehaliotis, Constantinos; Philippot, Laurent; Nicol, Graeme W.; Karpouzas, Dimitrios

doi:10.1128/spectrum.02403-21

Cited by 9 publications

(1 citation statement)

References 81 publications

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“…AOA rather than AOB are often major ammonia oxidisers in agricultural soils [ 18 , 130 , 131 ] and the improved identification of resident nitrifiers is facilitating the development of targeted approaches to suppress their nitrification activities at various soil pH regimes. For example, a novel potential nitrification inhibitor, quinone imine, has recently been developed and shown to act more effectively than DCD and NP on AOA in acidic soils [ 132 ]. The isolation of acid-tolerant and acidophilic strains also offers opportunities for evaluating the efficacy of existing nitrification inhibitors on nitrification under acidic conditions, for understanding their mechanisms of action, as well as for designing and testing novel inhibitory compounds specific to the unique physiology of acidophilic nitrifiers while minimising harmful impacts on non-target organisms and the environment.…”

Section: Applications and Implicationsmentioning

confidence: 99%

Nitrification in acidic and alkaline environments

Leung

Daebeler

et al. 2023

Essays in Biochemistry

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Aerobic nitrification is a key process in the global nitrogen cycle mediated by microorganisms. While nitrification has primarily been studied in near-neutral environments, this process occurs at a wide range of pH values, spanning ecosystems from acidic soils to soda lakes. Aerobic nitrification primarily occurs through the activities of ammonia-oxidising bacteria and archaea, nitrite-oxidising bacteria, and complete ammonia-oxidising (comammox) bacteria adapted to these environments. Here, we review the literature and identify knowledge gaps on the metabolic diversity, ecological distribution, and physiological adaptations of nitrifying microorganisms in acidic and alkaline environments. We emphasise that nitrifying microorganisms depend on a suite of physiological adaptations to maintain pH homeostasis, acquire energy and carbon sources, detoxify reactive nitrogen species, and generate a membrane potential at pH extremes. We also recognize the broader implications of their activities primarily in acidic environments, with a focus on agricultural productivity and nitrous oxide emissions, as well as promising applications in treating municipal wastewater.

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Section: Applications and Implicationsmentioning

confidence: 99%

Nitrification in acidic and alkaline environments

Leung

Daebeler

et al. 2023

Essays in Biochemistry

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Key biochar properties linked to denitrification products in a calcareous soil

Cayuela,

Spott,

Pascual

et al. 2024

Biochar

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Meta-analyses show an overall decrease in soil N2O emissions after biochar (BC) amendment. Nonetheless, N2O mitigation with BC cannot be extrapolated to every BC-soil combination, inasmuch as an increase in soil N2O release has been occasionally reported. We hypothesized that BC characteristics are key, and performed two microcosm experiments to advance in the understanding of the properties associated. We first investigated how 22 well-characterized BCs affect N2O emissions in a calcareous soil under denitrification conditions. Whereas most BCs decreased N2O emissions, some substantially increased N2O emissions. In a second experiment, we selected and further characterized eight of the 22 previous BCs. We applied the 15N-gas-flux method to study how these BCs affect denitrification products (N2O and N2) in the same soil. Results indicate that the interaction between BC and the denitrification process depends on the temperature of pyrolysis. Whereas BCs produced at 400 °C tended to increase total denitrification (N2O+N2) by an average of 28%, BCs produced at 600 °C significantly reduced total denitrification by 53%. Nevertheless, this decline in overall denitrification did not result in a decrease of N2O emissions, as there was a strong shift in the N2O/(N2+N2O) ratio favoring N2O. A redundancy analysis revealed a direct correlation between carboxylic groups on BCs surface and N2O emissions. This research enhances our understanding of the interaction of BC with denitrification, particularly concerning the relevance of the temperature of pyrolysis, and opens up new paths for investigation, crucial for optimizing the application of BCs in different soil environments. Graphical Abstract

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