Sensitivity of fusarium moniliforme, F. oxysporum and F. salani to superoxide anion and hydrogen peroxide in vitro

ABSTRACT

The sensitivity of three Fusarium species [i.eFusarium moniliforme Sheldon, F. oxysporum Schlecht. and FSolani [Mort.] Sacc.] to a superoxide anion [O2-] producing system and to hydrogen peroxide [H2Op] differed with species and stage of growth Conidial germination, sporulation and mycelial growth were more sensitive to the O2-producing system or H202, respectively, in FOxysporum, F moniliforme and FSolaniThe least sensitive to O2-or H2O2 were conidial germination in F. moniliforme, sporulation in FSolani and mycelial growth in F Oxysporum The inhibitory effects of O2-increased with increasing riboflavin concentration and H202 increased with increasing H2O2 concentrationAlso, the viability of conidiospores, particularly F. moniliforme and F. oxysporum from 7-day old illuminated cultures, was decreased by O2-treatment However, possible application of O2-producing system[s] or H2O2 as antifungal for use in soil-borne plant diseases control was discussed