Structural differences in the secondary phloem suggest higher support and storage potential in stems than roots of <i>Cytharexylum myrianthum</i> Cham. (Verbenaceae)
Bibliographic record
Abstract
Stems and roots are interconnected by their secondary phloem, a complex tissue that exhibits functional differences related to the anatomical structure of each organ. Here, we compared the structure of secondary phloem in mature stems and roots of Citharexylum myrianthum Cham. (Verbenaceae). We sampled the main stems at a height of 1.3 m and the roots at a depth of 0.5 m. We described both the qualitative and quantitative features of all secondary phloem cell types, and compared the quantitative features using a paired Student’s t test. The same percentage of sieve tubes in the conducting phloem between the organs indicates a similar conducting efficiency between stem and roots, even though sieve tubes have wider diameters in the stems. Overall, stems had a higher portion of nonconducting secondary phloem than the roots, with a higher number of both parenchyma and sclerenchyma bands, likely indicating a higher storage and support potential of the phloem in stems.
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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 | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".