Chilling Injury of Sweet Potato Shoots Reduced by Prior Incubation of H2O2 and NaCl
Bibliographic record
Abstract
Excised shoot tips of sweet potato (Ipomoea babatas L.) were incubated in H 2 O 2 or NaCl aqueous solution for 24h or 48h prior to a 3-day chilling at 2.5°C.Severity of chilling injury was visually observed during a post-chilling 7-day recovery at 21°C, and scored at 0 to 5 (none to most severe injury).In the first experiment, when cv. Purple (PUR) sweet potato shoots were subjected to 3-day chilling at 2.5°C, a 48h pre-treatment of 150 mM H 2 O 2 under 16h photoperiod reduced chilling injury, but H 2 O 2 showed no effect under 8h photoperiod.An increase of Oxygen Radical Absorbance Capacity (ORAC) occurred two days after recovery at room temperature, and such increase in ORAC was negatively correlated with the severity of chilling injury symptoms observed after seven days at room temperature, indicating the possible protective nature of antioxidants.Because H 2 O 2 -reduced chilling injury occurred only on those pre-treated with 16h photoperiod, 16h was employed in subsequent NaCl experiments.In the second experiment, 4 cvs were used: Ace of Spades (ACE), B18, Purple (PUR), and Toka Toka Gold (TTG).Each cv formed a 3 x 2 factorial experiment: NaCl (0 mM, 200 mM or 400 mM) and incubation duration (24h or 48h).The effects of NaCl depended on cultivar (cv).NaCl at 200mM reduced chilling injury more for ACE than B18 and PUR, but NaCl increased the injury of TTG.The NaCl effects also depended on incubation duration (24h or 48h).Across 4 cvs the most beneficial NaCl treatment was 200 mM NaCl for 24h.In view of these results, both pre-treatments of H 2 O 2 and NaCl reduced chilling injury of sweet potato shoots, suggesting that moderate stress imposed as a pre-treatment increased plant tolerance to subsequent chilling under specific conditions.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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".