Phenovariation induced in <i>Streptocarpus prolixus</i> (Gesneriaceae) by β-glucosyl Yariv reagent
Bibliographic record
Abstract
Streptocarpus prolixus C.B. Clarke is a species in the family Gesneriaceae characterized by an acaulescent vegetative body. Instead of a stem bearing leaves developing from a shoot apical meristem, its vegetative body derives from the continued, intercalary growth of one of its cotyledons. β-glucosyl Yariv phenyglycoside (β-D-Glc)3 selectively binds a class of cell surface associated proteoglycans and glycoproteins known as arabinogalactan-proteins (AGPs). Treating seeds and seedlings of S. prolixus with (β-D-Glc)3 induced phenovariants considered phyogenetically significant because they copied morphological features (phenocopied) characteristic of other, presumably more primitive species of Streptocarpus as well as species in other genera in the family to which it belongs. These results paralleled those obtained in earlier experiments with S. prolixus using antimetabolites of hydroxyproline-containing proteins (Hyp-proteins). Treatment with α-galactosyl phenylglycoside, a Yariv reagent that does not bind AGPs, did not induce phenovariants. The finding that (β-D-Glc)3 produced the same "phyletic phenocopies" as Hyp-protein antagonists strongly suggests that the morphoregulatory Hyp-proteins that were antagonized in the earlier experiments were AGPs and that AGPs play a pivotal role in pattern formation and pattern change during plant morphogenesis.Key words: Yariv phenyglycoside, arabinogalactan-protein, AGPs, Streptocarpus, phenovariation, morphogenesis.
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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 | 0.000 | 0.000 |
| 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".