The Interaction Effect of Cadmium and Nitrogen on Populus yunnanensis
Bibliographic record
Abstract
In this study, we used Populus yunnanensis, a native precious poplar species which is only distributed in southwestern China, as a model species to study its morphological, physiological and biochemical responses to the interaction of different concentrations of nitrogen and cadmium, discussing the interaction effect of cadmium and nitrogen on Populus yunnanensis. The treatments consisted of three cadmium levels (0 mg/kg, 2 mg/kg and 4 mg/kg) and three nitrogen levels (0 mg/kg, 20 mg/kg and 40 mg/kg). After 40 days treatment, the results indicated that at the same nitrogen level, cadmium treatment had significant effects on all measured indexes, including plants growth, chlorophyll concentration, malondialdehyde (MDA) concentration, antioxidant enzymes activities (SOD, POD, CAT and APX), free proline, soluble protein and non-protein thiol. In addition, Populus yunnanensis also showed a certain degree of resistance to cadmium stress. Meanwhile, study also showed there were significant difference among the three levels of nitrogen treatments and the higher nitrogen treatment showed more significant effect of alleviation on cadmium induced damage than that of lower nitrogen treatment in Populus yunnanensis.
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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 | 0.000 | 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 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".