NEW SOD ISOFORM IN RHIZOPOGON ROSEOLUS (CORDA IN STURM) IN THE PRESENCE OF CADMIUM

Addition of cadmium to the nutrient inhibits the growth of mycelium of Rhizopogon roseolus. Different cadmium concentrations in the range 0. 3 - 90 mM reduce the SOD (superoxide dismutase) activity. All tested i soforms are of MnSOD type. The presence of cadmium results in the chan ges of isoenzyme pattern on 7% polyacrylamide gels. One of the observe d isoforms, probably being a changed form of an originally existing on e, is much slower. The 128 kDa isoform, being tested on gradipore gels , is less active. The presence of cadmium probably affects the molecul ar mass of the protein.