Non-ligninolytic fungus U. isabellina was able to degrade NP, 4-t-OP and 4-CP.
Xenobiotics removal was accompanied by the formation of hydroxylated metabolites.
Decrease of toxicity was observed during the biodegradation of NP, 4-t-OP and 4-CP.
Non-isomer-specific degradation of NP by U. isabellina was noticed.