STRUCTURAL FEATURES OF THE ASSIMILATIVE ORGANS OF SALSOLA PAULSENII LITV. IN THE CONDITION OF THE SOUTH-WEST KYZYLKUM

Abstract

Based on the study of the morpho-anatomical structure of the assimilative organs of Salsola paulsenii Litv., growing in the conditions of South-Western Kyzylkum, diagnostic and adaptive signs specific to it, were determined. The structure of the epidermis and mesophyll of cotyledons and leaves was analyzed. It was established that the mesophyll of the cotyledons of S. paulsenii belongs to the Kranz-centric (Salsoloid) type, as well as the presence of anomacytic and hemiparacytic types of stomata in the epidermis of the cotyledons. In the leaves of Salsola paulsenii, two different types of leaf mesophyll have been identified: Kranz-centric (Salsoloid) and Kranz-ventro-dorsal types, and in the leaf mesophyll the Salsaloid type explains that the peripheral vascular bundles are connected to the kranz cell. At the base of the leaf mesophyll there is a Kranz-ventro-dorsal structure. In the middle part and at the apex, the leaf mesophyll structure is Kranz-centric (Salsoloid type). In the leave epidermis of S. paulsenii, three types of stomata are established: anomacytic, hemiparacytic and paracytic; the anomacytic type of stomata is the most predominant. The presence of simple unicellular papillary trichomes is found from the middle part to the apex of the leaf. These identified diagnostic and adaptive anatomical signs in the mesophyll of cotyledons are dominated by xeromorphic signs, and in the mesophyll of leaves - halo-xeromorphic signs, which indicates the adaptation of this species to the conditions of South-Western Kyzylkum.