What question did this study set out to answer?

To identify the mechanisms by which soil pH regulates the N2O:N2 product ratio, functional denitrification gene abundance, and gene transcription.

February 23, 2010FEMS Microbiology EcologyOpen Access

Denitrification gene pools, transcription and kinetics of NO, N2O and N2 production as affected by soil pH

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To identify the mechanisms by which soil pH regulates the N2O:N2 product ratio, functional denitrification gene abundance, and gene transcription.
Sampled soils maintained across a pH range of 4.0 to 8.0 via long-term liming (≥ 20 years).
Quantified denitrification functional gene pools (nirS, nirK, nosZ), transcript abundance, and gas kinetics (NO, N2O, N2) during anoxic incubation with or without glutamate amendment.
Unamended soils relied on activation of a pre-existing proteome with undetectable gene transcription, whereas glutamate amendment induced sharp peaks in nirS and nosZ transcripts.
The transcription ratio of nosZ relative to nirS was higher at pH 6.1 than at pH 8.0, demonstrating that the high N2O:N2 ratio at lower pH results from post-transcriptional sensitivity during N2O reductase assembly.

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Implication

Controlled laboratory experiment reveals low pH increases nitrous oxide accumulation in agricultural soils, indicating post-transcriptional inhibition of nitrous oxide reductase.

Cite This Study

Liu et al. (2010) studied this question.

synapsesocial.com/papers/6a17722a56b3e2ada4127b8f https://doi.org/10.1111/j.1574-6941.2010.00856.x

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Implication

Controlled laboratory experiment reveals low pH increases nitrous oxide accumulation in agricultural soils, indicating post-transcriptional inhibition of nitrous oxide reductase.

Denitrification gene pools, transcription and kinetics of NO, N2O and N2 production as affected by soil pH

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Discussion

Implication

Cite This Study

Denitrification gene pools, transcription and kinetics of NO, N2O and N2 production as affected by soil pH

Key Points

Discussion

Implication

Cite This Study

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