Nitrogen sources of Oligoporus placenta and Trametes versicolor evaluated in a 23 experimental plan

► N from peptone increased growth of Oligoporus placenta and Trametes versicolor. ► Presence of gaseous N2 inhibited laccase formation. ► The diazotroph Beijerinckia acida slighly increased the biomass of T. versicolor. ► Experimental plans explored N sources and fungal-bacterial interactions.