Action inhibitrice des morphactines sur l'axe principal des Coleus

Abstract

Specimens of Coleus hybridus 'Chartreuse' have been treated with two morphactins (IT 3233 and IT 3456) which were applied, either one or four times, to the apex of the plant or the soil beneath, at 25 or 50 ppm. The treated plants have shown inhibition symptoms in their growth at the principal axis. Generally the action of IT 3233 was minimal; on the other hand, IT 3456 has brought a well-marked reduction of the length of the axes. A factorial analysis of the measurements of the treated groups by IT 3456 has permitted the determination of two very significant factors: 'method of application' and 'frequency'; also it has shown a significant interaction between these factors. The two concentrations used did not produce effects that were significantly different.