Cell wall polysaccharides F1SS disclose the relatedness of the genus <i>Geosmithia</i> with <i>Eupenicillium</i> and <i>Talaromyces</i>
Bibliographic record
Abstract
Cell wall polysaccharides have been used as chemotaxonomic markers in a number of fungal genera. In this study, alkali-extractable and water-soluble cell wall polysaccharides F1SS were purified from cell walls of species of the genus Geosmithia. Chemical and 1H-NMR analyses of these polysaccharides revealed three different structures: (i) the polysaccharide from Geosmithia namylowskii was composed of β-(1[Formula: see text]5)-galactofuranose chains attached to an α-(1[Formula: see text]2)-(1[Formula: see text]6)-mannan core identical to that isolated in several species of Eupenicillium, (ii) the polysaccharide from Geosmithia viridis was a glucomannogalactan similar to that obtained in Talaromyces flavus, and (iii) the polysaccharide from Geosmithia putterillii contained β-(1[Formula: see text]5)-(1[Formula: see text]6)-galactofuranose with some units of the β-(1[Formula: see text]5) residues substituted at position O-6 by single residues of galactofuranose; this galactan was attached to an α-(1[Formula: see text]2)-(1[Formula: see text]6)-mannan core. The taxonomy of the genus is discussed according to the polysaccharides F1SS, and our results are compared with the results of rDNA analyses in this genus.Key words: Eurotiales, Geosmithia, Eupenicillium, Talaromyces, cell wall polysaccharides, chemotaxonomy.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".