Influence of R/FR ratio on response of maize, lettuce, and <i>Amaranthus retroflexus</i> L. to UV‐B radiation
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract Plant species differ significantly in their response to environmental stressors and exposure to one stressor can modify their susceptibility to another stressor, which can have significant implications for crop‐weed competition. Plants exposed to low red/far‐red light (R/FR) ratio in a canopy may experience enhanced UV‐B radiation at a subsequent growth stage. The low R/FR ratio pre‐exposure may impact the susceptibility of weeds and crops to UV‐B radiation differently. This study investigates if exposure to different R/FR ratios and the associated changes in anthocyanin concentration influence plant susceptibility to subsequent UV‐B radiation. Maize ( Zea mays L.), which contains anthocyanin in the leaf sheath, and lettuce ( Lactuca sativa L.) and Amaranthus retroflexus L. (redroot pigweed), which contain anthocyanin in the lamina, were exposed to 0.3 and 1.1 R/FR ratio in growth chambers. Following R/FR ratio treatments, anthocyanin concentration in leaf sheath (maize) or lamina (lettuce and A. retroflexus ) was measured and plants were exposed to three levels of UV‐B radiation. UV‐B exposure significantly inhibited a variety of plant growth and allometric parameters; however, R/FR ratio pre‐treatment did not influence plant response to subsequent UV‐B exposure. Pre‐exposure to low R/FR ratio reduced anthocyanin concentration by 60% in maize leaf sheath, and 31% and 100% in lettuce and A. retroflexus lamina respectively, but this influence did not affect the plant response to UV‐B radiation. These findings are significant to our understanding of the ecophysiological underpinnings of crops and weeds and their interactions in agroecosystems where both R/FR ratio and UV‐B radiation levels fluctuate.
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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 | 0.003 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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