Dissipation of polycyclic aromatic hydrocarbons (PAHs) in soil microcosms amended with mushroom cultivation substrate

► Biostimulation with mushroom cultivation substrate removes PAHs in soil effectively. ► MCS changes the abundance and community compositions of soil microflora. ► Alfalfa antagonizes the bioremediation effects of MCS. ► The changes in PAH profile suggest an involvement of fungal laccase.