Apical dominance in vicia faba l.

Abstract

A side-effect of plant surgery was an interference with apical dominance. From the results of three experiments involving plant surgery, decapitation and the usage of "C-IAA, it appeared that the movement of the apically produced auxin to the region of the lateral buds was an essential pan of the dominance mechanism. There is evidence in the present investigation that the mechanism of apical dominance in broad bean involves an auxin or a similar metabolite diffusing from the apex and exerting an inhibitory effect directly or indirectly on the basal lateral buds.