Biology of the rare species of Pentaphylloides fruticosa (Rosaceae) in culture in the North

The purpose of this work was studying the biology of development, definition of a pool of flavonoids in medicinal raw materials and the genetic characteristics of the introduced plants of different samples of P. fruticosa (L.) O.Schwarz in conditions of the middle taiga subzone of the Komi Republic. Objects of research work are plants of five samples of P. fruticosa of various geographical origin (Gorno-Altaysk - a natural sample, Novosibirsk (The Central Siberian botanical garden), three samples of local reproduction of different age) and two samples collected in the Inta region of the Komi Republic on the right and left banks of the river Lemva. The standard modern methods of research were used: morpho- logical, ontogenetic, anatomic, genetic, biochemical. It is established that dura- tion of the ontogenetic states of plants in conditions of culture is reduced in comparison with natural ones. At the same time the intermediate ontogenetic state is noted, when along with blossoming there are signs of a virgin ontogenet- ic state. Features of structure of a flower are revealed and the process of polli- nation of the introduced samples is traced. Plants annually form full seeds, that speaks about resistance of their reproductive organs to new soil climatic condi- tions and the ability to self-renewal. It is shown that the anatomic structure of a sheet plate of P. fruticosa characterizes the plant as typically mesomorphic and photophilous. This information is useful for development of methods of its cul- tivation. For the purpose of studying the intraspecific diversity of collection samples of P. fruticosa the genetic analysis was carried out. The obtained ma- terial is necessary for further work on specification of taxonomical structure of the genus Dasiphora, including in the region.