Incorporation of [<sup>3</sup>H]sucrose after the resorption of nectar from the spur of <i>Platanthera chlorantha</i> (Custer) Rchb.
Bibliographic record
Abstract
Platanthera chlorantha (Custer) Rchb., a moth-pollinated orchid, secretes abundant nectar. Sucrose incorporation following the resorption of nectar from the spurs of the pollinated and unpollinated flowers of P. chlorantha was investigated. The study was carried out using 3H-labelled sucrose and microautoradiography. In this orchid species, nectar was secreted and accumulated in the spur. Inside the spur, the epidermis developed numerous unicellular secretory hairs engaged in nectar secretion and resorption. Nectar resorption occurred near the end of anthesis. Following pollination, sucrose from the resorbed nectar was incorporated into starch accumulated in parenchyma cells of developing capsules. Additionally, radioactivity in the cell walls of parenchyma and ovules was also observed. The label was not detected either in the gynoecium of unpollinated flowers or in tuberous roots of all plants investigated. Therefore, the results demonstrate that carbohydrates reclaimed from uncollected nectar in pollinated flowers of P. chlorantha are next utilized inside the adjacent maturing fruits.Key words: Platanthera chlorantha, Orchidaceae, nectar resorption, nectary spur, microautoradiography, pollination.
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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) | 0.000 | 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".