Variation in copper content of different apple parts during seasonal ripening
2009
Iwane, A.(Iwate Prefectural Univ., Takizawa (Japan). Morioka Junior Coll.)
Changes in copper content of were studied using Fuji apples grown in an experimental orchard of National Institute of Fruit Tree Science, Morioka in 2001. The effect of fungicide application (Bordeaux mixture including copper) on the concentration of copper was observed only in the peel of apples harvested until 1980. Following the substitution of the Bordeaux mixture for organic germicide from 1986 in the same orchard, this study investigated the copper content in different parts of apples picked from June 4 to November 12 (corresponding to one ripening season) at an interval of 4-5 weeks. Apples were separated into peel, pulp, core and seed immediately after picking for determination of copper content. Copper contents of pulp at harvest time in 2001 and 1980 were same (0.05 mg/100g raw). The copper content in pulp, core and seed in 2001 was consistently higher than that in 1980, throughout the ripening season. The content in raw apples without and with skin was the same in 2001 (0.053 mg/100g).
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