Abstract
The article presents the results of studies of the anatomical structure of the vegetative organs of Allium kysylkumi of the Amaryllidaceae family, which grows in the conditions of Kyzylkum (Kokchatau outlier mountain). The characteristic diagnostic features have been determined: the outer membrane of epidermal cells is well developed by the outer folded cuticle, cutinized and more thickened; leaves are amphistomatic; stomata are the most submerged, anomocytic type; isolateral-palisade type of leaf mesophyll; the conducting bundles are closed, collateral and are arranged in two rows, of which the upper side is represented only by small bundles, in the lower row, 3 large bundles alternate with one small bundle; peduncle and peduncle, parenchymal-beam type of structure; the epidermis is single-row, folded cuticle with more thickened and cutinized; the crustal parenchyma is thin-walled, round-oval, chlorophyll-bearing; the presence of lactic acid is in the cow parenchyma; the primary cortex is separated from the central cylinder by a ring of sclerenchyma; the central cylinder is extensive; closed collateral-type conductive bundles. In the vegetative organs of Allium kysylkumi, especially in the leaf, xeromorphic characters are pronounced, which indicates the fitness of this species in natural habitat. The revealed structural diagnostic signs of vegetative organs are species-specific, and show the adaptation of this species to its natural habitat, these micromorphological signs are taxonomic significance for distinguishing and identifying Allium species.
Highlights
Allium L. is a widely distributed genus comprised of more than 800 species that occur mainly in seasonally dry regions in the Northern Hemisphere, including Europe, Asia and North America, and in South Africa [1] [2] [3] [4]
The article presents the results of studies of the anatomical structure of the vegetative organs of Allium kysylkumi of the Amaryllidaceae family, which grows in the conditions of Kyzylkum (Kokchatau outlier mountain)
In the vegetative organs of Allium kysylkumi, especially in the leaf, xeromorphic characters are pronounced, which indicates the fitness of this species in natural habitat
Summary
Allium L. is a widely distributed genus comprised of more than 800 species that occur mainly in seasonally dry regions in the Northern Hemisphere, including Europe, Asia and North America, and in South Africa [1] [2] [3] [4]. Central Asia is the main center of distribution and diversity of this genus, and it is rich in species of Allium [3] [5]. The traditional taxonomic system placed Allium in the Liliaceae [6]. Vvedensky [14], Xu [12] and Stearn [1] divided the species of Allium from Russia, China and Europe into 10, 9 and 13 sections, respectively, based on morphological characters of the rhizome, bulb, leaf and flower. Hanelt et al [8] divided the genus into six subgenera and 50 sections and Friesen et al [3] and Nguyen et al [15] into 15 subgenera and 56 sections using information on anatomy, cytogeography and DNA ITS sequences
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