Selenium addition to the substrate did not affect the concentrations of other elements in the mushrooms during the three consecutive flushes. Aaaitionally, Cd, Cr, and Ni concentrations were below the detection limits of the ICP-OES, although low concentrations of these three elements were reported in Agaricus, Suillus, and Leccinum mushrooms. Both mushrooms, cultivated in the presence and in the absence of Se. shown similar uptake behaviours for the several elements of interest.