Relationships of pre-inoculation high temperature to root browning caused by Pythium aphanidermatum in hydroponically-grown sweet pepper
Bibliographic record
Abstract
Episodes of high root-zone temperature (33ºC) were investigated in relation to susceptibility of sweet pepper to root rot caused by Pythium aphanidermatum. Pepper plants were grown in aerated nutrient solution in hydroponic units positioned in temperature-controlled water baths. Root zone temperature was 23ºC except during high temperature treatments. Roots were exposed to 33ºC for 0 to 216 h, inoculated with P. aphanidermatum and assesseda at intervals for colonization by the pathogen and for severity of browning (necrosis). The pathogen colonized all roots within 12 h following inoculation. The roots turned brown earlier when exposed to 33ºC for more than 9 h prior to inoculation compared to those exposed for 0 to 6 h. Browning developed progressively earlier as the period at 33ºC was increased from 9 to 144 h, and was 4 days earlier for exposures of 144 to 216 h compared to 0 to 9 h. Browning was precocious also when inoculation was delayed as long as 216 h following exposure at 33ºC for 72 h. We conclude that high temperature predisposes pepper plants to precocious browning caused by P. aphanidermatum and that predisposition lasts for at least 9 days.
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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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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".