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diatom perizonium production

traitmech:000693 · CLASS · PROPOSED

A biomineralization phenotype in which a diatom produces the siliceous band system called the perizonium in an auxospore wall.

Trait evidence (3)

  • DOI:10.1371/journal.pone.0272778
    The deposition of the primary TP band became evident when the auxospore center attained a slim and rigid appearance.

    Kaczmarska et al. 2022, PMID:36067191, PMC9447881, Results: Epizonium and perizonium. TP means transverse perizonium. Scientific Abstract, Introduction, Methods, early Results, this subsection and Discussion: Auxospore structure and development read in official Europe PMC XML on 2026-10-10; actual Figure 11 inspected. Other actual figures and S1 Appendix unread. EXT_ID:36067191 AND SRC:MED confirmed ID, title, DOI and scientific abstract. Clone HK328 (= ECT3902) originated from Florida Bay material in 2011; atypical morphology and prolonged cultivation limit canonical assignment. PDMPO labels silica deposited after addition. SEM resolves inner TP/LP bands apart from initial valves; fixed images do not establish live kinetics. Authors leave some epizonium/perizonium layer boundaries uncertain. Scaly-band architecture and proposed shape control are not universal or demonstrated necessities.

  • DOI:10.1371/journal.pone.0181413
    transverse perizonial bands produced all together or in quick succession rather than being added to the auxospore apex one at a time

    Kaczmarska et al. 2017, PMID:28813426, PMC5558960, scientific Abstract; EXT_ID:28813426 AND SRC:MED confirmed identity. Abstract, Methods prose, Results: Auxospore wall fine structure, related Discussion paragraphs and actual Figure 5 read on 2026-10-10. Table 1/2 headers, footnotes and StA:7/8 and Van5:5/6 rows inspected; other rows not fully interpreted. Other actual figures and supplements unread. Fixed stages support the authors' inferred collapsible-cup sequence, not a live secretion time course. No longitudinal perizonia found under their structural criterion; initial epivalves must be distinguished. Discussion retains the Tabularia fasciculata study (reference 100); reinterpretation targets other papers. Aged small cultures, original isolates and progeny are distinct; culture abnormalities do not define canonical morphology.

  • DOI:10.1016/j.ejop.2013.06.002
    Silica precipitation began throughout the auxospore at or near maximal length, but initially was detectable in isolated regions throughout the structure.

    Mather et al., online 2013-08-22, 2014 issue, PMID:23972513. Complete scientific Abstract directly read in official Europe PMC CORE on 2026-10-10 using EXT_ID:23972513 AND SRC:MED; one exact MED result with matching ID, title and DOI. Tabularia fasciculata under the source name lacked transverse perizonium; longitudinal deposition preceded initial valves near maximal auxospore length. Undetectable silicon by EDS is not absolute absence. Publisher full text unavailable; Methods, actual figures and supplements unread. These three primary studies have overlapping authors, not independent-laboratory replication.

Provenance

Identifier source
TraitMech local identifier
Definition source
DOI:10.1371/journal.pone.0272778

Parent traits (1)

kg-microbe context

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

Discussions and Knowledge Gaps (2)

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

Resolve exact mappings without conflating auxospore wall components.

CURATION TODO OPEN diatom-perizonium-production-scope-and-mappings · raised by codex · 2026-10-10

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.

Biomineralization traitmech:000690 is strictly broader. This is production, not a material band, inherited band possession, silica uptake, or auxosporulation alone. Incunabular scales, epizonium, initial valve/girdle frustules and setae are not automatically this endpoint. Scaly bands in mediophytes do not justify universal parenting to siliceous scale production. Existing frustule/seta boundary notes are not unresolved exact perizonium groundings. No requirement for both transverse and longitudinal bands, a single geometry, one-at-a-time secretion, deposition during expansion, or sexual origin is imposed. No organism-level disjointness or fitness effect is asserted. Exact synonyms, properizonium terminology and external phenotype equivalences remain unasserted pending authority review; structure terms are not automatically phenotype xrefs.

Resolve canonical study material and formation-specific causal evidence.

KNOWLEDGE GAP OPEN diatom-perizonium-production-exemplars-and-mechanisms · raised by codex · 2026-10-10

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.

No canonical examples are assigned: source clone origins were read, but current taxonomy and figure-to-mating-pair attribution need reconciliation, including atypical or aged cultures. Keep mineral deposition, band patterning and shape control separate. Static microscopy, PDMPO/EDS observations and sequence features alone do not establish a conserved causal protein mechanism or necessity for shape control. Protein edges require functional evidence and taxon-paired accessions. Mechanism is deferred, not claimed absent.

Curation history

  1. · MINTED_TRAITMECH_ID · codex

    Added diatom perizonium production beneath biomineralization with three primary DOI citations and directly checked short snippets. Ignored-and-hidden main/worktree/open-PR reservation checks support 000693 and v569 block 1064600-1064699. Existing trait records unchanged; mappings, canonical taxa and mechanisms remain open. Timestamp records the observed UTC curation decision.

Recorded curation sessions

  • · codex
    • CREATE — Add diatom perizonium production with three primary sources

      Added traitmech:000693 beneath biomineralization, three DOI citations with source-checked snippets, two open scope and mechanism discussions, and v569 METPO:1064600 proposal. No canonical examples or causal graph asserted; existing trait records unchanged.

    Read this curation session