Single and combined effects of temperature and red:far-red light ratio on evening primrose (<i>Oenothera biennis</i>)
Why this work is in the frame
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Bibliographic record
Abstract
Few studies have considered the interactive effects of temperature and red:far-red light ratio (R:FR) on plants. We studied the effects of these two factors on evening primrose (Oenothera biennis L.). Plants were grown under two temperature regimes (22 °C day – 18 °C night and 28 °C day – 24 °C night) and two R:FR light ratios (low, simulated shade FR enrichment and normal, simulated natural sunlight) in controlled-environment chambers and their growth and physiological characteristics were measured. Among the 23 parameters, 20 were affected by temperature, 21 were affected by light quality, and 16 were affected by their interactions. Higher temperatures increased stem height, photosynthetic pigments, and ethylene, but decreased gas exchange and, in turn, plant biomass. Low R:FR increased stem height, transpiration, stomatal conductance, and ethylene, but decreased photosynthetic pigments, water-use efficiency, and photosynthesis and, in turn, plant biomass. Distinct parallel patterns were found for the combined effects of temperature and light quality. Plants had 2.3 times lower total biomass under lower temperatures at low R:FR than under the same temperatures at normal R:FR. However, plants had 2.8 times lower total biomass under higher temperatures at low R:FR than under the same temperatures at normal R:FR. We conclude that the interactive effects of temperature and R:FR are different than that of the single factors on the natural populations of O. biennis.
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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