XVI International Botanical Congess

The research on mycorrhizal community structure was carried out on zinc wastes in southern Poland, characterized by a high concentration of Zn, Pb, Cu, Cd, As and pH of ap. 7,0. The site was planted with pine 15 years ago. The root samples were collected three times per year. Parallely, the occurrence of macromycetes fruitbodies was observed. 80% of reported fungi are mycorrhizal species, specific to Pinus sylvestris or having a broad host range. In the substratum samples, 11 morphotypes of ectomycorrhizas were described. Four of them were identified: Suillus luteus, Rhizopogon roseolus, Tricholoma scalpturatum, Hebeloma mesophaeum. The most common (70%) was yellow basidiomycete mycorrhiza. Quite abundant were black and brownish morphotypes. The annual dynamics of mycorrhizal population was estimated. Generally, the short roots density was the highest in summer, but alive mycorrhizal roots were dominant in spring and autumn.