Effect of treatment with Me JA on quality and antioxidant ability of postharvest blueberry fruit

Effect of treatment with Me JA on postharvest quality and antioxidant ability of blueberry fruit were investigated. “Darou” blueberries were fumigated with 0, 10, 50, 100μmol/L Me JA for 12 h and then respectively stored at 25℃ and 1℃ for ripening evaluation. Changes of quality and antioxidant ability were measured every day and every 3 days respectively during fruit storage. The results showed that the effect of Me JA treatment was related to storage temperature, Me JA treatment did not produce any significantly effect on fruit quality and antioxidant ability when fruits were stored at 25℃. However, Me JA-treated slowed down the decay of blueberry fruit which was stored at 1℃, and promoted the increase of total anthocyanin, phenolic contents, and the DPPH scavenging activity. However Me JA treatment did not produce any significantly effect on weight loss, TA, and TSS regardless of the storage temperature. The results indicated that the 50μmol/L Me JA treatment showed better effect than other concentrations during postharvest storage, and exerted better quality and higher antioxidant ability.