Effect of some phenolic compounds on spore germination and germ-tube length of Aspergillus fumigatus and Fusarium oxysporum fsp iycopersici

ABSTRACT

The effects of twelve different phenolic compounds on the percentage germination and germ-tube lengths of spores of Aspergillus fumigatus Fresenius and Fusarium oxysporum f. sp. lycopersici [Sacc.] Synder and Hansen were studied. The results indicate that the compounds vary in their inhibitory action on the spores of these two fungi depending on dosage, the organism under test and the chemical structure of the compound. Gallic acid, resorcinol, m-digallic acid and hydoquinone insignificantly affected the percentage spore germination of both fungi, even at high concentrations. The remaining compounds, on the other hand, revealed different inhibitory compound to the most in the order pyrogallol, 2, 4-dinitrophenol, phenol, salicylic acid, p- cresol, m-cresol, o-cresol and o-nitrophenol. The effects of the two fungi were generally similar to those of spore germination