Acción de hormonas vegetales sintéticas en talofitas. I. Estudio sobre hongos patógenos in vitro

Abstract

The action of synthetic plant hormones on pathogenic fungi was studíed. The hormones used were 2, 4-dichlorophenoxyacetic acid (2 , 4-D) and 2, 4, 5-trichlorophenoxyacetic acid (2, 4, 5-T) ; the fungi used were Caudida albicans, Phialophora jeanselmei and Microsporum gypseun. No activity was shown by 2, 4-D on these fungi. On the other hand a lethal action of 2, 4, s-T was observed. The minimum lethal concentrations were: for C. albicans 190 mg/1iter; for M. gypseum 19 mg/liter and for Ph. jeanselmei 12.8 mg/liter. The hormone was growth-stimulant to C. albicalns in a concentration of 47.5 mg/liter; no stimulus was observed in the other fungi. Some remarks are made, on the possible application of these hormones in dermic mycoses, which is now being investigated.