ON THE ISSUE OF FORMATION OF THE MORPHOLOGICAL STRUCTURE OF THE UNDERGROUND ORGANS IN ONTOGENY

Ecological and biological assessment and research at the population level securities flora are most relevant. From this point of view, of great scientific and practical interest Astragalus propinquus Schischk. This paper presents a synthesis to identify the characteristics of development in ontogenesis and formation of the morphological structure in perennial herbaceous polycarpic A.propinquus and his vicar species A. membranaceus and A. mongholicus. Is closely related species cemeystva Fabaceae genus Astragalus. These species are among the 50 basic medicinal plant resources of traditional Tibetan and Chinese medicine. We have studied the structure and age structure of populations of Astragalus propinguus, A. membranaceus, state of populations and features of morphogenesis A.mongholicus in Northern Mongolia. By life form species belong to many-headed longrod grassy polycarpic with monocarpic shoots elongated type, consistently developing and replacing each other; hemicryptophytes. In the ontogeny of the species studied clearly distinguished 4 periods: latent, pregenerativny, generative and postgenerativny. The ten states of age: seeds (se), the seedlings (p), juvenile (j), immature (im), virginal (v), the young generative (g1), srednegenerativnye (g2), the old generative (g3), subsenilnye (ss ) and senile (s). Ontogeny complete simple. Thus, the morphological structure of the underground organs A.propinquus, A. membranaceus and A. mongholicus formed sequentially, there are four stages of formation: predkaudeksnogo development, formation obratnokonusovidnoy forms caudex, forming razvalistoy forms caudex and particulation with incomplete separation caudex, which corresponds to four periods ontogeny.