Effect of Exogenous Methyl Jasmonate on Chilling Injury and Quality of Pineapple (Ananas comosus L.) cv. Pattavia
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Abstract
This experiment was carried out to determine the effect of methyl jasmonate (MeJA) on chilling injuries andquality of pulp in pineapple (Ananas comosus L. cv. Pattavia). The effect of exogenous MeJA on quality andstorage life of pineapple cv. Pattaviawas was investigated. Pineapples were treated with 0 (control), 10-3, 10-4and 10-5M MeJA and then stored at 10 °C, 85% relative humidity. Pineapple treated with MeJA significantlyreduced chilling injuries and percentage of fruit weight loss compared to the control treatment. Percentage ofweight loss of pineapple non-treated with MeJA was ranged from 13.73-19.64%, while that of treated pineappleranged from 3.81-11.99%. After storage for 21 days, the browning symptoms associated with chilling injurieswere observed in the pulp adjacent to the core of the pineapple fruit. Chilling injuries were found to be associatedwith electrolyte leakage, chilling injury index and total phenolic content, which had increased during storage. Thevalue of electrolyte leakage, chilling injury index and total phenolic content from pulp tissue treated with MeJAwas lower than with non-treated fruits. Total soluble solids (TSS), titratable acidity (TA), total sugars andreducing sugars of treated pineapple were not significantly different from that of the control pineapple.
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