Determination of Optimal Concentration of LPE (Lysophosphatidylethanolamine) for Postharvest Stability and Quality of Strawberry Fruit
2016
Choi, K.Y., Kangwon National University, Chuncheon, Republic of Korea | Kim, I.S., Kangwon National University, Chuncheon, Republic of Korea | Yun, Y.S., Korea National Open University, Seoul, Republic of Korea | Choi, E.Y., Korea National Open University, Seoul, Republic of Korea
This study aims to determine the optimal maturity of strawberry fruits as affected by the application of lysophosphatidylethanolamine (LPE) and its optimal concentration for postharvest stability and quality. Prior to application of treatments, fruits that were classified into levels of maturity (0%, 50%, 70% and 100%) were air-dried for 40 minutes and stored in the refrigerator at 4oC for 12 days. Fruits at 70% maturity were dipped into 0, 10, 50 and 100 mgㆍL-¹ LPE solutions for 1 minute. A lower range of concentration (0, 2.5, 5, 10 and 25 mgㆍL-¹) was applied to fruits at different maturity levels. Data on fresh weight, hardness at vertical and horizontal loading positions, color index and sugar content during storage were collected. Based on fruits with 70% maturity dipped in LPE concentrations, there were no significant differences found on fresh weight, color index and sugar content. However, the application of 10 mgㆍL-¹ LPE gave the highest hardness at vertical loading position while 100 mgㆍL-¹ had the lowest average. At lower range of LPE concentrations, fresh weight was not significantly affected by LPE application and maturity levels. Hardness of fruits was mainly based on the maturity of the fruits. Increased hardness was observed in the fruits with 70% maturity dipped into the 5mgㆍL-¹ of LPE solution. The hardness and Hunter’s L* and b* value of 100% matured fruits gave lowest values despite the application of 25 mgㆍL-¹ LPE 12 days after storage.
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