Experimental introduction of Polygala sibirica L. (Polygalaceae) in the Yakutsk Botanical Garden

The purpose of research is to develop a strategy for the conservation of Polygala sibirica L. and to study the biological characteristics of the species in culture. An introductory experiment with a species Polygala sibirica L, rare in Yakutia, is described. Under natural conditions and in culture, seed propagation of P. sibirica is difficult due to poor seed germination and poor survival of seedlings. In the experiment, most of the seeds germinated in the third year. The life form of P. sibirica is a monocentric tap-root polycarpic with many-headed branched caudex with elongated shoots. In culture, the ontogeny of P. sibirica is simple, it continues during the life of one seed generation, no particulation occurs, and individuals die in the old generative and senile state. There are four periods and nine ontogenetic states in ontogeny: pregenerative period - seedlings, juvenile, immature, virginal states; generative period - young, middle-aged, old generative states; post-generative period - senile state. During the development of individuals, three phases of morphogenesis are observed: primary shoot - juvenile, immature, virginal ontogenetic states; the primary bush is young, the beginning of a mature generative ontogenetic state; loose bush - mature, old generative, senile ontogenetic state. P. sibirica in the nursery is characterized by a stable rhythm of seasonal development and a high vitality of the introduced plants. The species annually goes through a full cycle of shoot development with the formation of viable seeds. Self-seeding is formed. The critical moment in cultivation of P. sibirica is the low survival rate of seedlings. The species can be classified as a promising introducent.