Inflorescence and floral ontogeny in<i>Osteospermum ecklonis</i>(Asteraceae)
Why this work is in the frame
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Bibliographic record
Abstract
Development of the capitulum inflorescence with different types of florets in Asteraceae is an interesting issue in the field of plant evolution and development. In this study, ontogeny of the inflorescence and florets of Osteospermum ecklonis (DC.) Norl., an ornamental and evergreen subshrub, was investigated using epi-illumination light microscopy. The initiation and subsequent development of florets on the highly convex inflorescence apex occurred acropetally, except for the ray florets, which showed a lag in initiation. Organogenesis in disc florets started with unidirectional initiation of corolla lobes from the adaxial side and then proceeded by simultaneous appearance of five stamen and finally two median carpel primordia. Significant developmental features included the lack of pappus differentiation, formation of nonsyngenesious stamens, and formation of the ovule-less ovary. Ray florets showed significant differences from disc florets as reflected by the zygomorphic shape of floral apex and shift of floral merosithy from pentamery to tetramery. Also, expansion of corolla lobes to form the ligule and the formation of staminodia were observed. It is hypothesized that the actinomorphic pentamerous disc florets are most primitive among the family from which the tetramerous ray florets are derived. Accordingly, ray florets evolved from disc florets under long-term selective pressure and play a crucial role in enhancing reproductive success.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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) | 0.000 | 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 it