Effects of Uniconazole-P on Abscission and Endogenous ABA, IAA, and GA-like Substances Levels of Satsuma Mandarin Fruitlet

Kiyohide KOJIMA; Akihiko GOTO; Sadahiko NAKASHIMA

doi:10.1271/bbb.60.901

Bioscience, Biotechnology, and Biochemistry

Online ISSN : 1347-6947
Print ISSN : 0916-8451

Effects of Uniconazole-P on Abscission and Endogenous ABA, IAA, and GA-like Substances Levels of Satsuma Mandarin Fruitlet

Kiyohide KOJIMA, Akihiko GOTO, Sadahiko NAKASHIMA

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Keywords: abscisic acid, gibberellin, citrus, indole-3-acetic acid, fruit-drop

JOURNAL FREE ACCESS

1996 Volume 60 Issue 5 Pages 901-902

DOI https://doi.org/10.1271/bbb.60.901

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Abstract

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.

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