期刊
SCIENTIA HORTICULTURAE
卷 292, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scienta.2021.110655
关键词
Melatonin; Phenylpropanoid pathway; Plum; Quality; Ripening process; Storage
类别
The study demonstrated that exogenous melatonin treatment could slow down the ripening process of plum fruit, reduce decay incidence, and enhance disease resistance by activating the phenylpropanoid pathway. Melatonin application shows promise in suppressing postharvest deterioration and extending the shelf-life of plum fruit.
The effects of exogenous melatonin on ripening and decay incidence of plum fruit (Prunus salicina L. cv. Taoxingli) were investigated after the plums at green mature stage were dipped in 0 (as the control), 0.05, or 0.1 mmol center dot L-1 melatonin solution for 1 h, and then stored at room temperature (25 +/- 1 degrees C) and 75-80% relative humidity (RH) for 14 d. The results showed that melatonin treatments could slow the ripening process as indicated by the firmness, respiration rate, and ethylene production, and decreased the weight loss and decay incidence of plum fruit during storage. Moreover, the melatonin treatments activated the phenylpropanoid pathway by increasing the activities of phenylalanine ammonia-lyase (PAL), 4-coumarate-coenzyme A ligase (4CL), cinnamate-4-hydroxylase (4CH) and peroxidase (POD), and accompanied by higher contents of total phenols and lignin, which might be contributed to enhancing the disease resistance in plum fruit during storage. Therefore, it was suggested that melatonin application could be a promising method to suppress postharvest deterioration, maintain fruit quality and extend the shelf-life of plum fruit.
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