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cyanobacterial multiseriate trichome formation

traitmech:000676 · CLASS · PROPOSED

A morphological phenotype in which a cyanobacterium develops a trichome containing more than one adjacent row of cells through cell division in multiple planes.

Trait evidence (3)

  • DOI:10.1002/2211-5463.13016
    cells divide at a right angle to the longitudinal filament axis and in planes parallel or oblique to the primary trichomes.

    Springstein et al. (2020), Introduction; primary full-text XML https://www.ebi.ac.uk/europepmc/webservices/rest/PMC7714070/fullTextXML and actual Figure 2E inspected. The text links multiplanar division to multiseriate Chlorogloeopsis fritschii PCC 6912 trichomes, contrasting them with lateral Fischerella branches. Figure 2E shows a mature multiseriate stage, distinct from the linear hormogonium in 2D. Methods describe stock cultures at 37 degrees C in BG11 or BG11(0), with an 18:6 light-dark cycle; Van-FL microscopy follows a one-hour stain. This morphology evidence is not the separate FtsZ-overexpression phenotype.

  • DOI:10.1186/s12862-017-1053-5
    When grown in BG11, C. fritschii developed multi-seriate filaments.

    Koch et al. (2017), Additional file 1, Figure S6A caption, PDF page 8; actual S6 and S1 images and supplementary text pages 1-2 inspected at https://media.springernature.com/original/springer-static/esm/art%3A10.1186%2Fs12862-017-1053-5/MediaObjects/12862_2017_1053_MOESM1_ESM.pdf. S6B instead shows aseriate clusters with 100 mM NaCl; loose clusters are not automatically multiseriate trichomes. Main Results and S1 report salt-associated multiseriate main filaments in Fischerella, showing that branching and multiseriality can coexist and that salt responses are taxon-specific. Transcript correlations do not establish a universal mechanism.

  • DOI:10.3126/on.v14i1.16445
    The present algal taxon exhibited vertical and horizontal divisions of cells and has a tendency to form filamentous structure.

    Halder (2016), Results and discussion, article page 95, https://www.nepjol.info/index.php/ON/article/view/16445/13360. Methods, description and actual Figure 1A-D on page 96 inspected. The description records cell rows and Conclusions describe progression from uniseriate to multiseriate filaments. This is light-microscopy-based identification of field material, not sequence-confirmed identity, a controlled time-lapse lineage experiment, or proof of the paper's suggested fertilizer benefit.

Provenance

Identifier source
TraitMech local identifier
Definition source
DOI:10.1002/2211-5463.13016

Parent traits (1)

kg-microbe context

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

Canonical examples (1)

Organisms cited as exemplars of this trait. Taxon ids are NCBITaxon and link out to the NCBI record.

  • Chlorogloeopsis fritschii NCBITaxon:1124 DOI:10.3126/on.v14i1.16445 Restricted to the multiseriate stage described for field collection NH-1260, sampled on 18 March 2013 in a rice field at Balagarh, Hooghly, West Bengal, India. Provenance and herbarium deposition are reported in Methods/Results at https://www.nepjol.info/index.php/ON/article/view/16445/13360. The source identifies the material morphologically; it is not assigned a PCC strain identity. Live NCBI efetch https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=taxonomy&id=1124 confirms the current species name and rank species, not an NH-1260 accession or independent phenotype evidence. Not every cell, stage or condition is multiseriate.

Discussions and Knowledge Gaps (2)

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

Review the closer multicellular morphology parent and terminology.

CURATION TODO OPEN multiseriate-trichome-scope · raised by codex · 2026-10-08

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.

Use phenotype METPO:1000059 below quality METPO:1000188. The definition concerns adjacent cell rows in a trichome, including two rows, not multiple independent uniseriate trichomes merely bundled in a common sheath. It is not a synonym of branched shaped METPO:1000687, generic filament shaped morphology, hormogonium formation traitmech:000651, or cyanobacterial false branching traitmech:000675. Cell-shape parents do not unambiguously capture this multicellular organization; obsolete cell-arrangement terms redirect to flagellar arrangement and are unsuitable. Springstein's parenthetical description speaks of multiple trichomes in a row, whereas its division context and the other inspected sources support adjacent cell rows. Keep that wording distinction explicit. The qualified label does not cover every multiseriate algal or plant structure. No exact synonyms, xrefs, SSSOM mappings, mandatory branching or organism-level disjointness are asserted.

Resolve native division-plane control without conflating experimental states.

KNOWLEDGE GAP OPEN multiseriate-trichome-mechanism · raised by codex · 2026-10-08

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.

The cited studies distinguish natural developmental states, environment-associated changes and engineered protein overexpression. Do not transfer an engineered phenotype to a natural canonical example or infer a gene mechanism from transcript correlations. Neither salt exposure, a fixed row number, a persistent filament length nor a fitness benefit defines the whole class. No causal graph is proposed pending a protein-resolved native mechanism with verified accessions; mechanism is deferred, not claimed absent.

Curation history

  1. · MINTED_TRAITMECH_ID · codex

    Added cyanobacterial multiseriate trichome formation with three DOI sources, source-checked snippets and a qualified field example. Ignored-and-hidden main/worktree/open-PR checks support 000676 and v552 block 1062900-1062999. Kept branching, loose clusters, bundled trichomes and engineered morphotypes distinct. Existing records unchanged; timestamp is observed UTC.

Recorded curation sessions

  • · codex
    • CREATE — Add cyanobacterial multiseriate trichome formation

      Added PROPOSED traitmech:000676 with three DOI-backed snippets, a stage-qualified morphology-identified field example, scope and mechanism discussions, and companion v552 METPO proposal. Existing records unchanged; no causal graph asserted.

    Read this curation session