Effects of nutrient availability on the production of pentaynene, a secondary compound related to defense, in <i>Rudbeckia hirta</i>
Bibliographic record
Abstract
Abstract This study focused on the effect of different availabilities of mineral resources in hydroponic culture on the production of polyacetylenic defences of Rudbeckia hirta L. Specifically, we investigated if there was any difference concerning the amount of pentaynene, measured with high performance liquid chromatography (HPLC), produced in flowers of plants grown at high light intensity (500 µmol m −2 s −1 photosynthetic photon flux density) and two levels of mineral resources (full strength and 1/5 dilution) in a hydroponic solution . A working hypothesis was that the concentration of secondary compounds would increase with decreasing nutrient supply, in accordance with the carbon:nutrient balance hypothesis. The amount of pentaynene produced in the flowers of R. hirta decreased with increasing flower age but increased significantly when the plant was subjected to a reduced nutrient availability. The decrease in pentaynene concentrations with flower age was also less pronounced in the nutrient‐stressed plants.
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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".