Procambium–cambium transition during vascular meristem development in<i>Diospyros lotus</i>
Bibliographic record
Abstract
Trees owe their growth in girth to cambial activity that gives rise to secondary conducting tissues. Since cambium originates from the primary vascular meristem, called procambium, the main objective of the present study was to analyse the changes occurring during transition from procambium to cambium in Diospyros lotus L., characterized by the occurrence of double-storied cambium. In this species, procambium and primary vascular tissues are present only within the bud, whereas just below this level, cambium and secondary vascular tissues occur. Procambium differentiates as a continuous cylinder, which as a whole transforms into cambium during further development. Commonly used criteria distinguishing procambium and cambium — that is, the appearance of periclinal divisions, intrusive growth of meristematic cells, presence of rays, and primary versus secondary nature of derived vascular tissues — were analysed in D. lotus. All these features, however, were present in procambium, making the sharp distinction between both stages of vascular meristem based on these criteria difficult. In addition, the formation of fusiform and ray initial storeys in D. lotus was shown to appear in the third year of cambium activity and become more distinct with cambium age. The double-storied structure may result from the genetic control of cell fate and (or) the presence of epigenetic patterns determining cellular arrangement.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".