Abstract
Raspberries are highly perishable and have a short storage life. To extend its storage life, we evaluated the impact of preharvest melatonin (MEL) application (0, 50, 100, 200 µmol L−1), three days before harvest, on the activities of oxidative and antioxidative enzymes and quality attributes in ‘Esperanza’ raspberries up to 10 d cold storage. The 200 µmol L−1 MEL-treated raspberries exhibited a significant reduction in disease incidence while maintaining higher marketable fruit and activities of superoxide dismutase, glutathione reductase, dehydroascorbate reductase, monodehydroascorbate reductase, ascorbate peroxidase and catalase as compared to control. Additionally, it reduced activities of polyphenol oxidase, peroxidase and lipoxygenase enzymes and increased flavonoids and ascorbic acid levels. However, preharvest spray of 100 µmol L−1 MEL mitigated fruit weight loss and maintained higher anthocyanins, and glutathione than control. In conclusion, MEL application (100–200 µmol L−1), three days before harvest, supressed oxidative stress by maintaining higher activities of antioxidant enzymes in raspberries during 10 d of cold storage.
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Claims 8
Claim · model-written summary
At 200 µmol L−1, melatonin significantly reduced disease incidence relative to control.
Verbatim
e0“The 200 µmol L−1 MEL-treated raspberries exhibited a significant reduction in disease incidence while maintaining higher marketable fruit and activities of superoxide dismutase, glutathione reductase, dehydroascorbate reductase, monodehydroascorbate reductase, ascorbate peroxidase and catalase as compared to control”
Claim · model-written summary
At 200 µmol L−1, melatonin maintained more marketable fruit than control.
Verbatim
e0“The 200 µmol L−1 MEL-treated raspberries exhibited a significant reduction in disease incidence while maintaining higher marketable fruit and activities of superoxide dismutase, glutathione reductase, dehydroascorbate reductase, monodehydroascorbate reductase, ascorbate peroxidase and catalase as compared to control”
Claim · model-written summary
At 200 µmol L−1, melatonin maintained higher superoxide dismutase, glutathione reductase and dehydroascorbate reductase activities than control.
Verbatim
e0“The 200 µmol L−1 MEL-treated raspberries exhibited a significant reduction in disease incidence while maintaining higher marketable fruit and activities of superoxide dismutase, glutathione reductase, dehydroascorbate reductase, monodehydroascorbate reductase, ascorbate peroxidase and catalase as compared to control”
Claim · model-written summary
At 200 µmol L−1, melatonin maintained higher monodehydroascorbate reductase, ascorbate peroxidase and catalase activities than control.
Verbatim
e0“The 200 µmol L−1 MEL-treated raspberries exhibited a significant reduction in disease incidence while maintaining higher marketable fruit and activities of superoxide dismutase, glutathione reductase, dehydroascorbate reductase, monodehydroascorbate reductase, ascorbate peroxidase and catalase as compared to control”
Claim · model-written summary
At 200 µmol L−1, melatonin reduced polyphenol oxidase, peroxidase and lipoxygenase activities.
- Taxon
- raspberriest0
- Treatment
- melatonint0
- Outcome
- activities of polyphenol oxidase, peroxidase and lipoxygenase enzymese0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Additionally, it reduced activities of polyphenol oxidase, peroxidase and lipoxygenase enzymes and increased flavonoids and ascorbic acid levels”
t0“Melatonin application suppresses oxidative stress and maintains fruit quality of cold stored ‘Esperanza’ raspberries”
Claim · model-written summary
At 200 µmol L−1, melatonin increased flavonoid and ascorbic acid levels.
Not reportedTaxonTreatmentComparator
Verbatim
e0“Additionally, it reduced activities of polyphenol oxidase, peroxidase and lipoxygenase enzymes and increased flavonoids and ascorbic acid levels”
Claim · model-written summary
At 100 µmol L−1, melatonin mitigated raspberry weight loss relative to control.
Verbatim
e0“preharvest spray of 100 µmol L−1 MEL mitigated fruit weight loss and maintained higher anthocyanins, and glutathione than control”
t0“raspberries”
Claim · model-written summary
At 100 µmol L−1, melatonin maintained higher anthocyanins and glutathione than control.
Verbatim
e0“preharvest spray of 100 µmol L−1 MEL mitigated fruit weight loss and maintained higher anthocyanins, and glutathione than control”
t0“raspberries”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.