Sensitivity of Fungal and Streptomycete Strains to Trifluralin and Magnetite Nanoparticles

Abstract

The aim of this study was to estimate the sensitivity of microorganisms, isolated from soil long-term polluted with obsolete pesticides, to magnetite (Fe3O4) nanoparticles and fluorinated dinitroaniline herbicide trifluralin, and to evaluate the inhibition activity of these substances. The response of fungi and streptomycete strains to the presence of magnetite nanoparticles in culture media is individual to each microorganism. For the most of studied microorganisms, the addition of trifluralin to culture media had a growth inhibition effect. An exception was the strain Streptomyces sp. 0412, which growth was stimulated in the presence of xenobiotic. The negative effect of pesticide was reduced, when before the addition to the culture medium the trifluralin was mixed and incubated with magnetite nanoparticles for 1 hour.

Effect of Trifluralin, Zero-Valent Iron and Magnetite Nanoparticles on Growth of Micromycetes

“…In all cases, the concentration and size of nanoparticles played an important role. In the literature, only one experiment on the direct effects of nZVI on fungi strain of Aspergillus versicolor, except our investigations (Postolachi et al, 2017), has been published (Diao&Yao, 2009). The authors have shown that even when the fungal culture was treated with a relatively high concentration of nZVI, the effect on its viability was zero.…”