ISHS Acta Horticulturae 436: I International Persimmon Symposium
EFFECT OF KINETIN AND B-9 ON GROWTH AND CARBOHYDRATE PARTITIONING IN ONE-YEAR-OLD TREES OF PERSIMMON (DIOSPYROS KAKI) |
| Authors: | M. Park, B. Kim, S. Kang |
| Keywords: | B-9, carbohydrate recycling, Diospyros kaki, kinetin, persimmon, senescence, vegetative growth |
| Abstract:
Kinetin and B-9 were sprayed five times during the growing season to determine their effect on growth and the pattern of carbohydrate partitioning in persimmon trees (Diospyros kaki cv Fuyu). No significant difference was observed in tree growth of the control and kinetin-treated trees. B-9 reduced stem growth by 50%, it also reduced leaf area and the top/root ratio, but not the number of leaves. Concentrations of sugars in the leaves significantly increased in all treatments during senescence, up to about 25%, those in the roots also increased, but with no consistent changes upon treatments and sampling times. Starch concentrations in stem and the roots were not affected much by kinetin and B-9. However, B-9 treated leaves were characterized by a high concentration of starch. Reduction in tree growth by B-9 resulted in an almost proportional reduction in sugars and starch contents late in the season. However, percent distribution of sugars in different parts of a tree was not changed by B-9 while that of starch was. During the dormant season, more than 90% of sugars and starch were present in the roots. | |
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