Summary
This 2022 study by Okiobe, Pirhofer-Walzl, Leifheit, Rillig and Veresoglou in *Plant and Soil* investigates the mechanistic pathways—both direct (proximal) and indirect (distal)—through which arbuscular mycorrhizal fungal associations modulate denitrification in soils. The work appears to distinguish between direct fungal effects on denitrifying microbial communities and indirect effects operating through alterations to plant physiology or soil conditions. This mechanistic framing contributes to understanding how mycorrhizal symbioses influence a critical but poorly characterised aspect of soil nitrogen cycling.
Regional applicability
The study was conducted in Europe (likely Germany, based on author affiliations), and the mechanisms of AM-mediated denitrification are broadly applicable to United Kingdom soils and arable/grassland systems where AM fungi are established. However, transferability depends on soil type, climate and land management; UK-specific field validation would strengthen evidence for local practice recommendations.
Key measures
Denitrification rate; soil nitrogen cycling; arbuscular mycorrhizal colonisation; microbial community composition (as suggested by mechanisms-focused title); soil chemical and biological properties
Outcomes reported
The study examined how arbuscular mycorrhizal (AM) associations influence terrestrial denitrification through both proximal mechanisms (direct fungal effects on denitrifying microbial communities) and distal mechanisms (indirect effects via plant physiology and soil properties). Specific measurements of denitrification rates and associated microbial or soil parameters are inferred from the mechanistic focus of the title.
Topic tags
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