Abstract
Growth of Amanita muscaria, Cenococcum graniforme, Laccaria laccata, Pisolithus tinctorius, Rhizopogon roseolus, Suillus brevipes, S. grevellei, S. luteus, and Thelephora terrestris on Hagem Nutrient Agar as modified by Modess at 20°C for 28 days was inhibited by cadmium, lead, and nickel. All fungi were arrested by 350 μg cadmium per ml (ppm) or less. Lead arrested five species at 200 ppm or less; Cenococcum graniforme, L. laccata, and S. luteus were arrested at 2,000 ppm lead. Nickel arrested growth of six fungi at 20 ppm or less. Amanita muscaria, S. luteus, and L. laccata were arrested at 40, 175 and 225 ppm nickel, respectively. Metal concentrations that did not arrest delayed growth for 7–21 days after which the growth rate was comparable to the control.
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