[4-1330-A] Postharvest/Food Technology and Process Engineering (2)

[4-1330-A-05] Postharvest Ethylene Application Influences Biochemical Quality of Pummelo Fruit Under Low Temperature Storage

*Paemika Promkaew¹, Varit Srilaong², Satoru Kondo¹ (1. Graduate School of Horticulture, Chiba University(Japan), 2. Division of Postharvest Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (Bangkhuntien)(Thailand))

Keywords:Ethylene, Pummelo, Low temperature

The effects of exogenous ethylene on the biochemical quality of 'Tumtim Siam' pummelo (Citrus maxima Burm.) fruit under low temperature were investigated. Fruit were treated with 10 µL L^-1 ethylene for 12 hours at 25 °C and then stored at 10 °C for 40 d. Fruit treated with ethylene showed a remarkable ethylene production after 10 d and respiration rate at 20 d. The chlorophyll concentrations and hue angle value of peel and pulp were decreased by ethylene treatment compared to the untreated control. The carotenoid, phenolic and ascobic acid concentrations were significantly higher at 20 and 30 d in the ethylene treated-fruit than the untreated control. However, sugar concentrations were significantly higher at 20 and 30 d in the untreated control than the fruit treated with ethylene. Overall, ethylene had a significant effect on the peel and pulp coloration and on the biochemiacl qualities in pulp of the fruit during storage at low temperature.