Getting around the legume nodule: II. Molecular biology of its peripheral zone and approaches to study its vasculature
Bibliographic record
Abstract
All legume nodules exhibit a complex cortex composed of many types of cells and tissues. This zone, which surrounds the central infected zone, plays a critical role in regulating the exchange of oxygen between the rhizosphere and the bacteroids. Not often mentioned, but of importance, are the vascular traces that develop in the nodule inner cortex. Information on their ontogeny is scarce, although their existence is critical to the symbiosis because both the nitrogenous compounds formed as a result of nitrogenase activity and the energy-rich molecules obtained from plant photosynthesis use these conduits. Here, I focus on these tissues, reviewing what we know of their appearance in pseudonodules, boron-treated legumes, and in the vasculature mutants described to date. I also examine the genes known to be expressed in the peripheral tissues and attempt to place them in functional clusters. Finally, I propose that specific vasculature markers known from the Arabidopsis literature be applied to the study of the development of nodule vascular tissues. It is of interest that most of these markers are linked to specific growth regulators, especially auxins and cytokinins but to a lesser extent gibberellins and brassinosteroids.
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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".