EN
One drove investigations in vitro qualifying intensity of respiration of funguses: Alternaria alternata( Fries) Keissler, Aspergillus niger van TIEGHEM, Mucor mucedo Fresenius, Trichotchecium roseum LINK under influence of salt of lead (II) in concentrations 0.5; 1.0; 5.0 mmol dm-3 and on supervisory basis not containing of lead. Toxicity of heavy metal significance depended of sort of funguses and douses of lead.