Growth characteristics of Hormoconis resinae (Lindau) von Arx & de Vries, isolated from premises of the 4th unit of the Chernobyl NPP were studied on solid and liquid media. Radial growth rate of the studied strains varied from 0.05 to 0.08 mm an hour and did not depend on radioactivity of isolation place and composition of the nutrient medium. Index of substrate I colonizing intensity has demonstrated that all studied strains grew better on nutrient-rich medium. Morphological changes in studied strains on starving nutrient-poor media showed a decrease of biomass accumulation, reduction of sporogenesis, inhibition of micelial growth. Concerning both characteristic of biomass accumulation and morphological changes, all studied strains were referred to 3 groups: (1) heterotrophic strains, (2) strains with a tendency to oligocarbotolerance, (3) strains of intermediate group.
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