Document Type : Full Paper
Professor, Department of Horticulture, Faculty of Agriculture, Urmia University
PhD student, Department of Horticulture, Faculty of Agriculture, Urmia University
Associate Professor, Department of Horticultural Sciences, Faculty of Agriculture, Urmia University, Urmia, Iran
Associate Professor of Horticulture, Faculty of Agriculture, University of Tabriz
Assistant Professor, Department of Horticulture, Imam Khomeini International University, Qazvin, Iran
In this study, the methyl jasmonate (MeJA) was applied at 0, 10 and 100 μM concentrations for 16 h at 20 °C to delay senescence and maintain quality in strawberry fruits during storage at 3 ± 0.5 °C for 12 days. Methyl jasmonate-treated fruits showed higher levels of total acids and vitamin C. The firmness of strawberry fruits treated with methyl jasmonate was higher compared to the control after 12 days of storage. The highest levels of total phenolics and total anthocyanins of strawberry fruits treated with 100 μM methyl jasmonate were observed after 8 days of storage. Methyl jasmonate treatment had a significant decrease in pH, decay and soluble solids (p˂0.01) compared to the control. The expression of genes of ethylene biosynthesis pathway, which included ACO and ACS, showed a slight increase on the 8th day of storage in fruits treated with 10 and 100 µM methyl jasmonate, and then decreased. The highest level of gene expression on the 8th day of storage was related to the 10 μM treatment. The results of the present study showed that methyl jasmonate can preserve the quality and postharvest life of strawberry fruit (cv. Sabrosa) during storage, by stimulating the ethylene biosynthetic pathway only to the extent that it can activate the defense system and the mechanisms involved in the enhancement of tolerance to the biotic and abiotic stresses, as well as by accumulating antioxidant compounds.