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KMID : 0903620010420030319
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Journal of the Korean Society for Horticultural Science
2001 Volume.42 No. 3 p.319 ~ p.324
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Effect of Ca , K , and Mg Contents on Browning of Blossom End Part of Sweet Persimmon (Diospyros kaki L . Cv. Fuyu)
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Abstract
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This study was conducted to investigate the effect of principal canon concentration on the browning of blossom end part of ´Fuyu´ persimmon occurred during cold MA storage. The principal cation concentrations of soil sample at the orchards where the browning of persimmon fruit did not appear were compared with those of soil sample at the orchards where the browning of persimmon fruit sometimes appeared. Ca concentration was higher in soil sample at orchards where the browning of persimmon fruit did not appear than that of orchards where the browning of persimmon fruit sometimes appeared. K and Mg concentrations were higher in abnormal soil than in normal soil. The mineral concentration of bark tissue was analyzed. The bark tissue sample at the orchards where the browning of persimmon fruit did not appear contained more calcium than bark tissue sample at the orchards where the browning of persimmon fruit sometimes appeared. Principal cation concentrations of the persimmon fruits were analyzed. Ca concentration of the flesh and peel was the lowest in the blossom end part. The severer the degree of blossom end browning, the lower calcium concentration of peel and flesh. The Ca/K+Mg ratio of fruit seemed to be low as the degree of fruit browning was severe. Negative correlations were found between Mg and Ca, as well as K and Ca concentration in fruit peel and flesh. These results suggested that the Ca concentration in the fruit seemed to be low because of decrease of Ca uptake due to antagonism with other ions and competition of Ca, Mg, and K canons in the limited binding sites of fruit peel and flesh. Ca deficiency in fruit was associated with occurrence of blossom end part browning of ´Fuyu´ persimmon.
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KEYWORD
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