Mayevs'ka S. Morpho-physiological aspects of moss resistents to the toxic effects of heavy metals.

The dissertation is devoted to the moss ability to absorb lead and cadmium ions accumulating them in cells, of absorbtion dynamics, of accumulation levels and distribution of the ions among cells and inside cells; of the investigation of the moss Plagiomnium undulatum ontogenesis, of regeneration of isolated gametophores, leaves and their fragments, as well as to the ability of plants to adaptate to toxic action of the heavy metal ions. It has been shown in absorbtion of lead active transport while in absorbtion of cadmium passive diffusion predominates. The absorbed cations were mainly concentrated in cytozole. As compared with external enviroment the concentration of cations increased hundred or more times as much. It has been established that 0,10 µM of cadmium induced adaptation of the moss to toxic action of cadmium.