Abstract
Root - the most important vegetative plant organ with a complex morphology and structure multiple functions in communication with the underground plant components of the environment. The development of the root system of 3 species of Astragalus in ontogeny, studied in the south of Kazakhstan. The root of Astragalus turczaninovii seedlings in the sowing (April) clearly expressed rod length of 14-17 mm. In juvenile plant root length of 16-21 mm, lateral roots 5 mm. On hypocotyl marked transverse folds and wrinkles, which is a sign of the root retraction.