Journal
INTERNATIONAL JOURNAL OF FOOD PROPERTIES
Volume 21, Issue 1, Pages 2411-2427Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10942912.2018.1528272
Keywords
Cuticle composition; Wax; Cutin; Crystal structure; Postharvest storage; Sweet oranges
Categories
Funding
- National Natural Science Foundation of China [31501543]
- Natural Science Foundation of Hunan Province, China [2016JJ6077]
- Agricultural Science and Technology Innovation Project of Hunan Province, China [2017GC03]
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Changes in composition and structure of orange cuticle during storage at 4 degrees C or 25 degrees C for 40days were investigated. The total epicuticular wax content of fruits increased during storage at 4 degrees C for 30days andthen decreased as storage time prolonged to 40days, while it increased continuously at 25 degrees C for 40days. The total intracuticular wax content of fruits increased to 9.70 g cm(-2) stored at 4 degrees C for 10daysand then decreased to 6.74 g cm(-2) for 40days. The total intracuticular wax content of fruits was decreased to 5.17 g cm(-2) stored at 25 degrees C for 10days andthen increased to 10.06 g cm(-2) for 30days. Fatty acids were the most abundant component of the epicuticular wax and terpenoids were restricted to the intracuticular wax. Terpenoids were restricted to the intracuticular wax, and their amounts in the fruit stored at 4 degrees C increased continuously during the first 20days of storage at 4 degrees Cand then decreased as storage time increased up to 40days. Although significant changes were found in the contents of the cutin monomer, their proportions did not change significantly during storage at 4 degrees C or 25 degrees C. Size of wax platelets crystals wax increased during storage of fruits at 4 degrees C up to 30days; however, the crystals were degraded and decreased as storage prolonged to 40days. Furthermore, the shape of the fruit cuticle surface wax crystals changed from flattened platelets to small granulelike after storage at 25 degrees C for 20-40days. The obtained results provide detailed information about the changes in orange cuticle occur during storage at varying temperatures, which may help in preserving the quality of citrus fruits during storage.
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