Radiation accidents, regular activities of nuclear power cycle enterprises, and nuclear weapons testing are sources of artificial high radiotoxicity actinides entering the environment. The actinides' long half-lives result in their constant accumulation on a planetary scale. Radioactive microparticles are one of the common forms of artificial actinides in soils. According to recent studies, soil micromycetes can increase the processes of hot particles destruction. A presented paper shows the ability of Cladosporium cladosporioides to transfer ²⁴¹Am from hot particles containing ²⁴¹Am and ¹³⁷Cs to the mobile biologically available form. We observed the ²⁴¹Am direct accumulation by micromycete mycelium for the first time. In contrast, the interaction of studied strains with ¹³⁷Cs from hot particles was different.

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