Comparative Study of the Anatomical Structure of Some Vegetative Organs <i>Allium caspium</i> (pall.) M. Bieb. and <i>Allium tschimganicum</i> B. Fedtsch. Ex Popov Growing in Natural Conditions of Uzbekistan

Abstract

The results of a comparative study of the structure of some vegetative organs of A. caspium and A. tschimganicum growing in natural conditions in Uzbekistan are presented for the first time. During the study of the desert representative A. caspium, the following diagnostic, structural features were revealed: ribbing of the peduncle and pedicel; thickening of the outer wall of the epidermis and wavy folding of the cuticle of the parenchymal-bundle type of structure; deep submergence of stomata: extensive core: thinness of the crustal parenchyma, the presence of lactic acid in it; the presence of a highly sclerified sclerinchymal ring between the crustal parenchyma and the central cylinder: the vastness of the core and the presence of hydrocytic cells in it, as well as the similarity of the structure of the stem and pedicel. In this species, a predominance of xeromorphic characters was noted, due to a tendency indicating xerophilization and adaptation to desert conditions. In A. tschimganicum, the following mesomorphic diagnostic structural features, opposite to the desert one, were also revealed: roundness of the stem and pedicel, dense folding of the cuticle surface, the presence of lactates in the crustal parenchyma, weak thickening of the crustal parenchyma, and the presence of a weakly sclerized sclerenchymal ring in the central color parenchyma: parenchymal-bundle type of structure, weak thickening of the outer wall of the epidermis and slightly waviness of the cuticle surface, the presence of lactic acid in the crustal parenchyma. Weak submergence of stomata, large-cell crustal parenchyma, extensive, large-cell, thin-walled, poorly sclerified central cylinder, also similarity to the structure of the stem with pedicel, but the presence of a cavity in the stem. The predominance of mesomorphic traits in this endemic species indicated more favorable mountain humid growing conditions were noted.