Abstract
The objective of this study was to estimate the ability of seven species nematode trapping fungi isolated from Iraqi agriculture soil to biosynthesize silver nanoparticles. All tested species showed the ability to produce silver nanoparticles. The UV-Vis spectra obtained from the fungal free-cell (FCF) amended with AgNO3 at wavelengths 433.5- 450 nm after 72hrs. showed significant variations in spectra of silver nanoparticles synthesis and different absorption peaks in specific wavelengths and the diameters of nanoparticles also differed according to the tested fungi. The absorption value of the tested fungi was between 0.3-0.5. Scanning electron microscope (SEM) micrographs showed that the synthesized silver nanoparticles are dispersed and mostly having spherical and ovoid shape within the size range between 5-90 nm. A.eudermata gave the smallest nanoparticles size of 5-35 nm, while A.cookedichison gave the largest nanoparticles size of 10-65 nm. 0ther species revealed different size of nanoparticles.
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