Scientific Reports of the Faculty of Agriculture, Okayama University
Published by the Faculty of Agriculture, Okayama University
ONLINE ISSN : 2186-7755

Quality Changes of Muscat of Alexandria Table Grapes as Influenced by Postharvest Cluster Stem Excision

エルアンサリー ディア オサマ 岡山大学
岡本 五郎 岡山大学
In 2003 and 2004, the potential of using table grapes, cv. Muscat of Alexandria, as fresh-cut products was cvaluated by investigating the effects of postharvest cluster stem excision on several quality attributes. Clusters were harbester either at 17 or 19℃Brix from mature grapevines grown in Okayama, Japan. The treatments included: (1) No excision (C): Intact clusters; (2) Excision at Iaterals (L); Branches carrying 2-7 berries; and (3) Excision at pedicels (P): Single berries without pedicels. Fruit was placed in commercial packages and stored for 6 days 25℃. As regards aroma, linalool production by P increased markedly without major changes in the other monoterpenes. In addition, high geraniol production was observed in C, while minor aroma changes ware observed in L. Total amino acid concentrations increased in P and C in comparison to L. Interestingly, at the end of the experiment, berries of treatment P had the highest firmness and visual quality, followed by C, while L was the lowest. It is concluded that grapes of Muscat of Alexandria are suitable for stemless marketing.
cluster stem