Interactions between atmospheric CO<sub>2</sub> concentration and phosphorus nutrition on the formation of proteoid roots in white lupin (<i>Lupinus albus</i> L.)
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Atmospheric [CO 2 ] affects photosynthesis and therefore should affect the supply of carbon to roots. To evaluate interactions between carbon supply and nutrient acquisition, the [CO 2 ] effects on root growth, proteoid root formation and phosphorus (P) uptake capacity were studied in white lupin ( Lupinus albus L.) grown hydroponically at 200, 410 and 750 µ mol mol −1 CO 2 , under sufficient (0·25 m m P) and deficient (0·69 µ m P) phosphorus. Plant size increased with increasing [CO 2 ] only at high P. Both P deficiency and increasing [CO 2 ] increased the production of proteoid clusters; the increase in response to increased [CO 2 ] was proportionally greater from low to ambient [CO 2 ] than from ambient to high. The activity of phosphoenol pyruvate carboxylase in the proteoid root, the exudation of organic acids from the roots, and the specific uptake of P increased with P deficiency, but were unaffected by [CO 2 ]. Increasing [CO 2 ] from Pleistocene levels to those predicted for the next century increased plant size and allocation to proteoid roots, but did not change the specific P uptake capacity per unit root mass. Hence, rising [CO 2 ] should promote nutrient uptake by allowing lupins to mine greater volumes of soil.
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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