Long-term storability of on-tree alcohol-treated 'Hiratanenashi' persimmons packed in plastic film
2007
Taira, S.(Yamagata Univ., Tsuruoka (Japan). Faculty of Agriculture) | Imai, E.
We compared the storability under cold storage (1degC and 5degC) of on-tree alcohol-treated 'Hiratanenashi' persimmons individually packed in plastic film with that of persimmons treated with carbon dioxide after harvest to remove astringency. The persimmons stored at 1degC had better storability than those stored at 5degC. The time periods by which half the persimmons softened and lost their marketability for on-tree alcohol treatment and carbon dioxide treatment with storage at 1degC were approximately 140 and 170 days, respectively. The loss of flesh firmness of the persimmons treated with carbon dioxide gas during cold storage was faster than that of the on-tree alcohol-treated persimmons. The firmness of the on-tree alcohol-treated persimmons decreased only slightly during storage for three months. The peel color and soluble solid concentrations of the persimmons stored at both temperatures changed only slightly. When the persimmons stored for 65 days at 1degC or 5degC were moved to 20degC with or without plastic film, the persimmons without plastic film softened faster than those with plastic film, and those stored at 5degC softened earlier than those stored at 1degC. The shelf lives of the on-tree alcohol-treated and carbon dioxide-treated persimmons packed in plastic film after being moved to 20degC were about 5 and 10 days, respectively. From these results, the storability of on-tree alcohol-treated 'Hiratanenashi' persimmons packed in plastic film is approximately three months under cold storage.
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