Fungistatic Activity of Engineered Nanoparticles

Resumo

The influence of various concentrations of Ag, TiO₂, and SiO₂ nanoparticles on conidia germination of the phytopathogenic fungus Bipolaris sorokiniana and mycelium growth of the xylotrophic fungi Pleurotus ostreatus and Neonothopanus nambi was analyzed. It is established that a decrease in conidia germination of phytopathogenic fungus and mycelium growth of the xylotrophic fungi occurs at relatively high silver nanoparticle concentrations. The appropriate ЕС₅₀ values for Bipolaris sorokiniana, Pleurotus ostreatus, and Neonothopanus nambi are found to be 30, 14, and 31 mg/dm³, respectively. No effect of various concentrations of TiO₂ and SiO₂ nanoparticles on the studied cultures of fungi is highlighted. Thus, the negative impact of nanosilver on the growth of fungi at a high concentration which is untypical for objects of the environment and a lack of this influence of titanium dioxide and silica nanoparticles testifies to the high resistance of mycelial forms of organisms to engineered nanoparticles.