Molecular and biochemical responses of perennial forage crops to oxygen deprivation at low temperature
Bibliographic record
Abstract
Abstract Anaerobic conditions developing under ice cover affect winter survival and spring regrowth of economically important perennial crops. Our objective was to assess interspecific differences in the resistance to anaerobic conditions at low temperature, and to relate those differences to plant metabolism. Four perennial forage species, alfalfa ( Medicago sativa L.), red clover ( Trifolium pratense L.), timothy ( Phleum pratense L.) and orchardgrass ( Dactylis glomerata L.), were subjected to a progressively developing anoxic stress by enclosing potted plants in gas‐tight bags in late autumn and exposing them to simulated winter conditions in an unheated greenhouse. Near‐anaerobic conditions were reached after 60 d of enclosure for orchardgrass, alfalfa and red clover, and after 80 d for timothy. The sensitivity of the species to anaerobic conditions, based on plant regrowth, was: red clover and orchardgrass > alfalfa > timothy. The concentration of ethanol increased in response to oxygen deprivation, and reached the highest value in the sensitive red clover, whereas its concentration was the lowest in timothy. The expression of the alcohol dehydrogenase (ADH) gene was markedly lower in timothy than in the other three species for which the expression was equivalent. We conclude that the greater resistance of timothy to anaerobic conditions at low temperature is associated with a slower glycolytic metabolism.
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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".