Cytokinins and mango flower malformation II. The cytokinin complement produced by Fusarium moniliforme and the ability of the fungus to incorporate [8-14C] adenine into cytokinins.
Staden J. van, Nicholson R. I. D.
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 : 423-431
Abstract : Cytokinin-like activity was detected in the mycelium of F. moniliforme [Gibberella fujikuroi] as well as in the medium in which it had been cultured. This suggests that the fungus is capable of synthesizing cytokinins. The latter conclusion is supported by the fact that [8-14C]adenine was incorporated by fungal cultures into compounds cochromatographing with trans-zeatin, trans-ribosylzeatin and iso-pentenyladenine. The degree to which incorporation occurred into these cytokinins is apparently a function of the growth phase of the fungus. The present evidence is discussed in terms of the role of cytokinins in mango flower malformation for which G. fujikuroi is reported to be the causal agent.