In Vivo Gas Exchange Measurement of the Site and Dynamics of Nitrate Reduction in Soybean
Bibliographic record
Abstract
A gas analysis system was built to study the relationship between the reductant cost of NO(3)(-) assimilation and the measured rate of CO(2) and O(2) exchange in roots, leaves, and stems+ petioles of soybean (Glycine max L. Merr. cv Maple glen) plants. The measurements were used to calculate the diverted reductant utilization rate (DRUR = 4*[measured rate of CO(2) + measured rate of O(2)], in moles of high-energy electron [e(-)] per gram per hour) in plants in the presence (N+) and absence (N-) of NO(3)(-). The differences in DRUR between the N+ and N- treatments provided a measure of the NO(3)(-)-coupled DRUR of 25-d-old plants, whereas a (15)NO(3)(-)-enriched nutrient solution was used to obtain an independent measure of the rate of NO(3)(-) assimilation. The measured reductant cost for the whole plant was 9.6 e(-) per N assimilated, a value within the theoretical range of four to 10 e(-) per N assimilated. The results predicted that shoots accounted for about 55% of the whole-plant NO(3)(-) assimilation over the entire day, with shoots dominating in the light, and roots in the dark. The gas analysis approach described here holds promise as a powerful, noninvasive tool to study the regulation of NO(3)(-) assimilation in plant tissue.
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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".