Title
Gibberellins play a role in the interaction between imidazole fungicides and cytokinins in araceae Gibberellins play a role in the interaction between imidazole fungicides and cytokinins in araceae
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
New York ,
Subject
Biology
Source (journal)
Journal of plant growth regulation. - New York
Volume/pages
15(1996) :2 , p. 87-93
ISSN
0721-7595
ISI
A1996VG47400007
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
Imidazole fungicides such as imazalil, prochloraz, and triflumizole and the triazole growth retardant paclobutrazol promote the shoot-inducing effect of exogenous cytokinins in Araceae, such as Spathiphyllum floribundum Schott and Anthurium andreanum Schott. The mechanism of their action could partially be based on the inhibition of gibberellic acid (GA) biosynthesis, because administration of GA(3) inhibits the phenomenon completely in S. floribundum, Not only is the suppression of GA biosynthesis involved, but also the metabolism of endogenous cytokinins is significantly altered. Although the balance between isopentenyladenine, zeatin, dihydrozeatin, and their derivatives was shifted to distinguished directions by administration of BA and/or imazalil and/or GA(3), no correlation between these changes in metabolic pathways and the number of shoots could be found. The metabolism of BA was not significantly altered by adding imazalil to the micropropagation medium of S. floribundum.
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