nitrification

METPO:1005001 · CLASS · SEEDED

A biological process in which ammonia is oxidized to nitrite (ammonia oxidation) and nitrite is oxidized to nitrate (nitrite oxidation), in two steps.

Trait evidence (1)

DOI:10.3389/fmicb.2020.01900
nitrification proceeds as a two-step process, involving the oxidation of ammonia to nitrite and the oxidation of nitrite to nitrate

Sedlacek et al. review the historical evidence that established nitrification as a microbially mediated, two-step ammonia- and nitrite-oxidation process.

Provenance

Identifier source: METPO (2026-06-12)
Definition source: DOI:10.3389/fmicb.2020.01900

Parent traits (1)

biological process METPO:1000630

Children (1)

complete ammonia oxidation traitmech:000187

kg-microbe context

No kg-microbe node embedding matched this record in the 2026-04-25 deepwalk.

Discussions and Knowledge Gaps (1)

Open questions attached to this trait. Seeded by just knowledge-gap-scan and curated; see the corpus-wide index.

Resolve an exact external ontology class for the complete nitrification process before adding a TraitRecord xref.

CURATION TODO OPEN nitrification-component-go-xref-gap · raised by codex · 2026-09-11

Not yet attached to a section of this record — a curator sets attaches_to (e.g. causal_graphs#some_edge) so the gap shows beside the mechanism it concerns.

METPO cites GO:0019329 ammonia oxidation and GO:0019332 nitrite oxidation as definition components, but each GO term covers only one half of the full two-step nitrification trait and is not exact enough for TraitRecord xrefs.

Curation history

2026-09-11T06:15:37Z · SEEDED_FROM_METPO · seed_from_metpo
imported from data/raw/metpo.owl (CLASS)
2026-09-11T06:20:00Z · ENRICHED_FROM_LITERATURE · codex
Enriched the active METPO nitrification class with DOI-backed two-step ammonia- and nitrite-oxidation evidence after a repository-wide duplicate review covering ignored and hidden files.