Postharvest melatonin treatment reduces chilling injury in sapota fruit

Abstract

BACKGROUND Sapota is a popular tropical fruit characterized by a very short postharvest life. Low‐temperature storage prolongs postharvest life of sapota fruit, but chilling injury symptoms can develop if the storage temperature is less than 14 °C. There have been no reports on the effects of postharvest melatonin application on the development of chilling injury in sapota fruit during cold storage. The objective of this study was to investigate the effects of different concentrations of postharvest melatonin application (0, 30, 60 and 90 μmol L−1) during cold storage (8 °C) for up to 30 days with an additional 1‐day shelf life at ambient temperature. RESULTS All melatonin treatments reduced chilling injury symptoms, reduced electrolyte leakage, malondialdehyde (MDA) content, H2O2 and superoxide anion (O2−), and increased proline content and the activity of superoxide dismutase (SOD), catalase (CAT) and γ‐aminobutyric acid (GABA), and reduced the activities of phospholipase D (PLD) and lipoxygenase (LOX) compared to the control. CONCLUSION Postharvest melatonin treatment could be a useful strategy for reducing chilling injury during cold storage and transport of sapota fruit. The results indicate that melatonin reduces chilling injury of sapota fruit through maintaining membrane integrity, SOD and CAT activities, and reducing PLD and LOX activities. © 2019 Society of Chemical Industry

A Melatonin Treatment Delays Postharvest Senescence, Maintains Quality, Reduces Chilling Injury, and Regulates Antioxidant Metabolism in Mango Fruit

“…However, all these discoveries are on the limited edge in postharvest fruits and vegetables in comparison with plant and animal cells. But there are studies, which have provided results for the maintenance of the antioxidant system with MT application in postharvest fruit and vegetables under stressful conditions (cold stress in the present study) as mentioned above in line with the previous studies done with tomato [39], pomegranate [40], sapota [55], strawberry [13], and peach [22] fruit. Additionally, cold stress tolerance is developed through enhanced activity of enzymes namely, H-ATPase, Ca-ATPase, and cytochrome c oxidase that will indirectly lead to maintenance of a high ratio of unsaturated/ saturated fatty acid and thereby low MDA production [40].…”

Melatonin Treatment Improves Postharvest Preservation and Resistance of Guava Fruit (Psidium guajava L.)

“…The antioxidant enzymes, including CAT, APX, polyphenol oxidase (PPO), peroxidase (POD), dehydroascorbate reductase, SOD, GR and GPX, are important for ROS homeostasis in fruit [14]. The non-enzymatic antioxidants include ascorbic acid (AsA), flavonoids, anthocyanins, phenolics, carotenoids, dehydroascorbic acid and glutathione (GSH) [14,41]. Melatonin works as an excellent antioxidant molecule in plants.…”

Effect of 1‐MCP coupling with carbon dioxide treatment on antioxidant enzyme activities and quality of fresh‐cut Fuji apples

“…MDA content and LOX enzyme activity are used as indicators to measure the degree of lipid peroxidation during storage (Hou, Han, Meng, Cai, & Liu, 2019; Mirshekari, Madani, Yahia, Golding, & Vand, 2020). As a principal product of membrane lipid peroxidation, MDA can not only indirectly determine the resistance of plants, but its content is also one of the critical signs to judge the degree of cell membrane damage (Aghdam & Bodbodak, 2013).…”

“…MDA content and LOX enzyme activity are used as indicators to measure the degree of lipid peroxidation during storage (Hou, Han, Meng, Cai, & Liu, 2019;Mirshekari, Madani, Yahia, Golding, & Vand, 2020). As a principal product of membrane lipid peroxidation,…”