Effects of Uniconazole-P on Abscission and Endogenous ABA, IAA, and GA-like Substances Levels of Satsuma Mandarin Fruitlet.
Uniconazole-P, a gibberellin (GA) biosynthesis inhibitor, did not affect growth of mandarin fruitlets definitely but stimulated abscission markedly. Endogenous abscisic acid concentration in fruitlets treated with uniconazole-P was about 4-fold higher compared with the control. Endogenous indole-3-acetic acid and total GAs levels also changed. The relationships between these changes in endogenous hormone levels and fruit abscission were discussed.
a Kuchinotsu Branch, Fruit Tree Research Stution, Kuchinotsu , Nagasaki 859-25 , Japan.
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Kojima
a Kuchinotsu Branch, Fruit Tree Research Stution, Kuchinotsu , Nagasaki 859-25 , Japan.
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Goto
a Kuchinotsu Branch, Fruit Tree Research Stution, Kuchinotsu , Nagasaki 859-25 , Japan.|b Saga Prefectural Fruit Tree Exp. Stn, Ogi-machi , Saga 845 , Japan.
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Nakashima
abscisic acid; citrus; fruit-drop; gibberellin; indole-3-acetic acid