Effect of packaging films on extending the quality of 'Saijo' persimmon fruit during cold storage
2019
Kramchote, S. ((Shimane University, Matsue, Shimane (Japan). Center for the Promotion of Project Research, Organization for Research), (King Mongkut's Institute of Technology Ladkrabang, Bangkok (Thailand). Faculty of Agricultural Technology)) | Nakatsuka, A. | Esumi, T. | Itamura, H.
'Saijo' persimmons are harvested in Japan mainly in October and November. A large amount of fruit is available on the market for a very short period because the quality of persimmons deteriorates rapidly after harvest and astringency-removal treatment. Therefore, this study aimed to investigate how packaging films such as polyethylene (PE; with no anti-fogging property) or an oriented polypropylene film (OPP; with anti-fogging property; OPP/anti-fogging film) could extend the postharvest quality of 'Saijo' persimmon fruit during cold storage. The fruit were packed in the two packaging films or unpackaged fruit used as a control before storage at 0℃ and 95% relative humidity (RH). The flesh firmness was maintained by the packaging films throughout the 75 d of storage period, while unpackaged fruit softened significantly. Using the peel color index (PCI), the color of the unpackaged persimmons changed after 15 d of storage but the color of those packaged using films (PE or OPP/anti-fogging) was maintained during 30 d of storage. However, the internal fruit quality of PE-packaged fruits was poor because of the extent of flesh blackening. Flesh blackening in the unpackaged and PE-packaged fruits was only observed after 15 d of storage. In contrast, no peel and flesh blackening were observed during the 75 d of storage period in fruit packaged with the OPP/anti-fogging film. The soluble solids content (SSC) remained stable during 75 d of storage except for fruit packaged with OPP/anti-fogging film after 75 d of storage. The use of OPP/anti-fogging film was most effective for maintaining the external and internal fruit quality during cold storage.
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