Fungal denitrification revisited – Recent advancements and future opportunities

Aldossari, Nouf; Ishii, Satoshi

doi:10.1016/j.soilbio.2021.108250

Cited by 64 publications

(28 citation statements)

References 123 publications

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Section: Discussionmentioning

confidence: 99%

“…Lastly, several understudied mechanisms would also contribute to soil N 2 O emission, for example, fungal denitrification (Aldossari & Ishii, 2021 ) and chemical processes (Chalk & Smith, 2020 ; Zhu‐Barker et al, 2015 ). For example, recent studies have identified that certain fungi (e.g., Fusarium ) can directly produce N 2 O (Aldossari & Ishii, 2021 ), and plant mycorrhizal associations can indirectly influence soil N 2 O emission by structuring N‐cycling microbiomes (Mushinski et al, 2021 ). Moreover, the lack of relationship between the responses of soil N 2 O emission and the responses of potential nitrification and potential denitrification (Figure S4 ) partially supports the hypothesis that biological processes are not the sole contributors to soil N 2 O emission (Zhu‐Barker et al, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

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Stimulation of ammonia oxidizer and denitrifier abundances by nitrogen loading: Poor predictability for increased soil N₂O emission

Zhang

Ábalos

et al. 2021

Global Change Biology

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Unprecedented nitrogen (N) inputs into terrestrial ecosystems have profoundly altered soil N cycling. Ammonia oxidizers and denitrifiers are the main producers of nitrous oxide (N2O), but it remains unclear how ammonia oxidizer and denitrifier abundances will respond to N loading and whether their responses can predict N‐induced changes in soil N2O emission. By synthesizing 101 field studies worldwide, we showed that N loading significantly increased ammonia oxidizer abundance by 107% and denitrifier abundance by 45%. The increases in both ammonia oxidizer and denitrifier abundances were primarily explained by N loading form, and more specifically, organic N loading had stronger effects on their abundances than mineral N loading. Nitrogen loading increased soil N2O emission by 261%, whereas there was no clear relationship between changes in soil N2O emission and shifts in ammonia oxidizer and denitrifier abundances. Our field‐based results challenge the laboratory‐based hypothesis that increased ammonia oxidizer and denitrifier abundances by N loading would directly cause higher soil N2O emission. Instead, key abiotic factors (mean annual precipitation, soil pH, soil C:N ratio, and ecosystem type) explained N‐induced changes in soil N2O emission. Altogether, these findings highlight the need for considering the roles of key abiotic factors in regulating soil N transformations under N loading to better understand the microbially mediated soil N2O emission.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Stimulation of ammonia oxidizer and denitrifier abundances by nitrogen loading: Poor predictability for increased soil N₂O emission

Zhang

Ábalos

et al. 2021

Global Change Biology

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“…However, explorations of most fungi in the nitrogen cycle largely lag behind those of bacteria, limiting a comprehensive understanding of fungal roles in the environment. Dissimilatory respiration of NO 3 – or NO 2 – by fungi termed fungal denitrification − may play a vital role in global nitrogen cycle . It may be a great contributor to greenhouse gas N 2 O in the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…Dissimilatory respiration of NO 3 − or NO 2 − by fungi termed fungal denitrification 18−20 may play a vital role in global nitrogen cycle. 21 It may be a great contributor to greenhouse gas N 2 O in the atmosphere. This is because fungal denitrifiers, compared to bacterial denitrification, could commonly end with N 2 O emission due to the lack of N 2 O reduction gene (nosZ).…”

Section: Introductionmentioning

confidence: 99%

Denitrification and N₂O Emission in Estuarine Sediments in Response to Ocean Acidification: From Process to Mechanism

Tang

et al. 2022

Environ. Sci. Technol.

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Global estuarine ecosystems are experiencing severe nitrogen pollution and ocean acidification (OA) simultaneously. Sedimentary denitrification is an important way of reactive nitrogen removal but at the same time leads to the emission of large amounts of nitrous oxide (N 2 O), a potent greenhouse gas. It is known that OA in estuarine regions could impact denitrification and N 2 O production; however, the underlying mechanism is still underexplored. Here, sediment incubation and pure culture experiments were conducted to explore the OA impacts on microbial denitrification and the associated N 2 O emissions in estuarine sediments. Under neutral (in situ) conditions, fungal N 2 O emission dominated in the sediment, while the bacterial and fungal sources had a similar role under acidification. This indicated that acidification decreased the sedimentary fungal denitrification and likely inhibited the activity of fungal denitrifiers. To explore molecular mechanisms, a denitrifying fungal strain of Penicillium janthinellum was isolated from the sediments. By using deuterium-labeled single-cell Raman spectroscopy and isobaric tags for relative and absolute quantitation proteomics, we found that acidification inhibited electron transfers in P. janthinellum and downregulated expressions of the proteins related to energy production and conservation. Two collaborative pathways of energy generation in the P. janthinellum were further revealed, that is, aerobic oxidative phosphorylation and TCA cycle and anoxic pyruvate fermentation. This indicated a distinct energy supply strategy from bacterial denitrification. Our study provides insights into fungi-mediated nitrogen cycle in acidifying aquatic ecosystems.

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“…Fungi also play a significant role in the nitrogen cycle. Diverse fungi are recognized as microorganisms who to reduce nitrate or nitrite to gaseous nitrogen oxides such as nitrous oxide (N2O), nitric oxide and dinitrogen via denitrification or co-denitrification (microbially mediated nitrosation), and to ammonium via ammonia fermentation (fungal dissimilatory nitrate reduction to ammonium) (Aldossari and Ishii, 2021). Boosted simultaneous nitrification and denitrification via addition of biodegradable carrier Phragmites communis in biofilm pretreatment reactor treating polluted source water (Feng et al, 2015).…”

Section: Denitrification Microbiologymentioning

confidence: 99%

A review on application of external carbon sources for denitrification for wastewater treatment

2022

Global NEST: The International Journal

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<p>With the increase in industrial and agricultural activities, huge amount of wastewater containing nitrogen is produced. Biological denitrification is currently the most widely used, sustainable and cost-effective process to remove nitrogen from wastewater. In biological denitrification, application of external carbon sources for denitrification is important because it is the way to boost the denitrification process and it is necessary for wastewater treatment plants that have to meet very stringent effluent nitrogen limits. This review study focused with treatment of wastewater using biological denitrification as advantages. This also deals with advantages of different external carbon sources with emphasis on biological denitrification as the cost of biological denitrification is controlled by the carbon source because the cost of biological denitrification is controlled by the carbon source.. Hence, use of alternative carbon sources such as agricultural wastes, and food waste is reviewed in this paper. This study recommend other waste material such as textile waste can be a part of denitrification because carbon source such as methanol, ethanol and acetic acid/acetate can be recovered from textile waste.</p>

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Fungal denitrification revisited – Recent advancements and future opportunities

Cited by 64 publications

References 123 publications

Stimulation of ammonia oxidizer and denitrifier abundances by nitrogen loading: Poor predictability for increased soil N₂O emission

Stimulation of ammonia oxidizer and denitrifier abundances by nitrogen loading: Poor predictability for increased soil N₂O emission

Denitrification and N₂O Emission in Estuarine Sediments in Response to Ocean Acidification: From Process to Mechanism

A review on application of external carbon sources for denitrification for wastewater treatment

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Fungal denitrification revisited – Recent advancements and future opportunities

Cited by 64 publications

References 123 publications

Stimulation of ammonia oxidizer and denitrifier abundances by nitrogen loading: Poor predictability for increased soil N2O emission

Stimulation of ammonia oxidizer and denitrifier abundances by nitrogen loading: Poor predictability for increased soil N2O emission

Denitrification and N2O Emission in Estuarine Sediments in Response to Ocean Acidification: From Process to Mechanism

A review on application of external carbon sources for denitrification for wastewater treatment

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Product

Resources

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Stimulation of ammonia oxidizer and denitrifier abundances by nitrogen loading: Poor predictability for increased soil N₂O emission

Stimulation of ammonia oxidizer and denitrifier abundances by nitrogen loading: Poor predictability for increased soil N₂O emission

Denitrification and N₂O Emission in Estuarine Sediments in Response to Ocean Acidification: From Process to Mechanism