Cytokinins and mango flower malformation III. The metabolism of [³H]iso-pentenyladenine and [8-14C] zeatin by Fusarium moniliforme.
Staden J. van, Bayley A. D., Macrae S.
Author Affiliation: UN/FRD Research Unit for Plant Growth and Development, Department of Botany, University of Natal, Pietermaritzburg 3200, South Africa.
Physiological and Molecular Plant Pathology 35 : 433-438
Abstract : Cultures of F. moniliforme [Gibberella fujikuroi] metabolized both trans-zeatin and iso-pentenyladenine rapidly but did not accumulate the applied compound, or the metabolites formed, in the hyphae. Whether these molecules enter the fungus at all is not known. The fungal cultures interconverted zeatin and iso-pentenyladenine and ribosylated these compounds. They did not produce radioactive metabolites that co-chromatographed with glycosyl-O-zeatin or dihydrozeatin derivatives. The significance of the interconversion of cytokinins, or lack thereof, within the fungus is discussed in relation to the aetiology of mango flower malformation.