Abstract
A simple initial screening procedure for selecting strains of white-rot fungi with potential for use in bioremediation of contaminated sites is described. Besides the ability to degrade low molecular weight PAHs, isolates were screened for their growth rate on straw-based agar media, their potential to tolerate high concentrations of phenanthrene and their ability to out-grow the cellulolytic fungus Trichoderma harzianum on straw agar plates. Results from simple in vitro tests were correlated with the ability of the different strains to degrade PAHs in sand microcosms. It was found that fungal growth rate on straw-based agar media in the presence of phenanthrene correlated well with the ability of the different fungi to degrade PAHs in sand microcosms. Whereas growth rate on straw-based agar plates per se was indicative of the ability of white-rot fungi to establish in the presence of a competing fungus, it was a poor indicator of the fungus’ ability to degrade PAHs.
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