Abstract
Background: Plum fruits constitute a good source of natural antioxidant substances. Particularly, plums contain large amounts of phenolic compounds and flavonoids having natural antioxidant activity which is effective in human diet. The aim of this study was to evaluate the effects of pre-harvest MeJA treatment on the fruit quality and bioactive compounds of three different Japanese plums under storage conditions.
 Materials and Methods: The effects of pre-harvest methyl jasmonate treatment (MeJA) on weight loss, color characteristics (L*, C* and h°), firmness, soluble solids content (SSC), titratable acidity (TA), total phenolics (TP) and total antioxidant activity (TAA) of ‘Black Beauty’, ‘Black Amber’ and ‘Fortune’ plum fruits during the cold storage (at 0±0.5 C and 90±5% RH) were investigated in this study. 
 Results: MeJA did not have significant effects on the weight loss (%) of ‘Black Amber’ and ‘Fortune’ fruits, whereas it was effective in delaying the weight loss of ‘Black Beauty’ at the end of storage. The color characteristics of all plum cultivars were not significantly affected by MeJA at the end of storage. In all plum cultivars, the SSC increased, while TA significantly (P
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