| Summary: | 碩士 === 國立屏東科技大學 === 農園生產系所 === 101 === Post-harvest physiology of ‘TN.# 17’ pineapple (Ananas Comosus L. Merr.) fruits collected from Wu’s orchard, Ma-Chia, Pingtung country, were studied. Effect of 1-methylcyclopropene treatment (0, 1.5, and 4.5 μL L-1) on respiration rate, ethylene production, quality parameters, weight loss, internal browning, polyphenol oxidase activity and peroxidase activity were investigated for various maturity and temperatures.
The result showed that 1-methylcyclopropene treatment (4.5 μL L-1 1-MCP) reduced respiration rate and ethylene production with storage temperature. The pineapple fruit exhibited typical non-climacteric fruit identified by no climacteric respiratory and ethylene peak.
1-MCP concentration of 1.5 μL L-1 was required to delay weight loss, color parameters, firmness, total soluble solids (TSS), tritatable acidity (TA), ascorbic acid and storage life of fruits with storage periods. Besides, difference maturity of pineapple fruits treatment on 1.5 μL L-1 1-MCP concentration was significant extended storage life, 35.71 and 33.28 respectively.
The pineapple cultivar ‘TN.# 17’ was more susceptible to chilling injury (blackheart). Expressed blackheart symptoms at 25℃ when stored beyond 1 week at 0-10℃, 2 weeks at 15℃, 3 weeks at 20-25℃. The susceptibility of pineapple fruit to chilling injury increased with maturity.
The fruit PPO and POD activity of the two maturity increased with the increase of chilling injury index, and the chilling injury occurred earliest in mature green than half shell yellow during 5℃ storage. The PPO and POD activity of pineapple fruit increased with the increase of storage duration and blackheart.
In conclusion, Pineapple fruits treated with 1-MCP and combined with suitable maturity and storage temperature were effective to extend the storage life and maintain edible quality. The result provided an available mode for the link of transportation and sale of pineapple fruits to the market.
|
|---|
