Vasheka O. Physiological features of introduced ferns of the family Dryopteridaceae Ching with different rhythms of seasonal development

The thesis is dedicated to establishment of differences of physiological and anatomical character for the representatives with different rhythms of seasonal development of Dryopteridaceae ferns. It concern to the major thickness of the leaf blades, stomatal density, and the smaller dimensions of the epidermal and stomatal cells, as well as the higher values of the surface density of leaves as contrasted to summergreen ferns. The evergreen plants have greater value of the waterholding ability, high parameters of the sublethal value of water deficit, and differences in the contents and seasonal dynamics of plastid pigments. Is proved, that the reliable changes in an acropetal direction of the ferns fronds xeromorphic signs are subjected the law Zalensky. Was determined that the ferns have considerable lectin contents.