Morphogenetic changes provoked by two antimicrotubular drugs with opposite effects during the developmental cycle of Allomyces arbuscula

Opposite morphogenetic changes have been provoked by growing A. arbuscula in the presence of two antimicrotubular agents: taxol maintained vegetative hyphal elongation growth and thereby prevented their apical differentiation into couples of male-female gametangia; nocodazole prevented germ tube outgrowth, induced emergence of epihyphal rhizoids and led to altered positioning of intrahyphal nuclei. Primary hyphal growth in the presence of taxol prevented the nocodazole-induced morphogenetic disturbance.