Morin Treatment Delays the Ripening and Senescence of Postharvest Mango Fruits

• Published in: Foods 2023-11, Vol.12 (23), p.4251
• Main Authors: Guo, Lihong, Liang, Kaiqi, Huang, Xiaochun, Mai, Weiqian, Duan, Xuewu, Wu, Fuwang
• Format: Article
• Language: English
• Subjects: Amino acids; Ascorbic acid; Biosynthesis; Carotenoids; Catalase; Cell walls; Cellular signal transduction; Correlation analysis; Energy consumption; Enzymatic activity; Enzyme activity; Enzymes; Ethylene; Ethylenediaminetetraacetic acid; Flavonoids; Free radicals; Fruit; Fruits; Gene expression; Genes; Liquid oxygen; mango; Mangoes; Methods; morin; Nanocomposites; Nitrogen; Nutritive value; Pectin; Pectin lyase; Peroxidase; Phosphates; Polygalacturonase; quality deterioration; Relative humidity; Ripening; ripening and senescence; Senescence; Signal transduction; Softening; Sucrose; Sucrose phosphate synthase; Superoxide; Superoxide dismutase; Vitamin C; Vitamins; Yellowing
• ISSN: 2304-8158; 2304-8158
• DOI: 10.3390/foods12234251

A 0.005% and 0.01% morin treatment was applied to treat mango fruits stored under ambient conditions (25 ± 1 °C) with 85-90% relative humidity, and the effects on quality indexes, enzyme activity related to antioxidation and cell wall degradation, and gene expressions involved in ripening and senescence were explored. The results indicate that a 0.01% morin application effectively delayed fruit softening and yellowing and sustained the nutritional quality. After 12 days of storage, the contents of soluble sugar and carotenoid in the treatment groups were 68.54 mg/g and 11.20 mg/100 g, respectively, lower than those in control, while the vitamin C content in the treatment groups was 0.58 mg/g, higher than that in control. Moreover, a morin application successively enhanced the activity of superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD), but reduced the activity of polygalacturonase (PG) and pectin lyase (PL). Finally, real-time PCR and correlation analysis suggested that morin downregulated the ethylene biosynthesis ( and, ) and signal transduction ( , , , and ) genes, which is positively associated with softening enzymes ( , , , and ), carotenoid synthesis enzymes ( and, ), sucrose phosphate synthase ( ), and uncoupling protein ( ) gene expressions. Therefore, a 0.01% morin treatment might efficiently retard mango fruit ripening and senescence to sustain external and nutritional quality through ethylene-related pathways, which indicates its preservation application.