The specificity of the structure of the epidermis of the leavesof spikeless varieties of Datura stramonium L. in VILAR biocollection

The research objective is to study the peculiarities of the structure of leaf epidermis of four spikeless samples of dope ordinary of VILAR biocollection. By means of light microscope the samples of the epidermis of the leaves of the dope species have been studied for the first time. For studying spikeless samples of dope ordinary, Datura stramonium L., their two species of the VILAR collection have been chosen: D. Stramonium var. inermis (Jaeq.) Lund. (the flowers are white, the stalks are green, the fruits are without thorns) and D. Stramonium var. godronii (Danert) hort. (the flowers are lilac, the stalks are violet, the fruits are without thorns) (three versions differing in height and terms of fruits’ maturing - 1-FB - medium height; No. 4-FB - tall, late-ripening; No. 10-FB - medium height). The features of the cells structure of epidermis, and also the species, the quantity and morphometric indicators of stomatal device in four kinds of the dope are described and illustrated. The sample of D. Stramonium var. godronii (Danert) hort. No. 4 has the largest and wide leaves, the sample of D. Stramonium var. godronii (Danert) hort. No. 1 has narrowed leaf plate. On the epidermis of the studied trikhoma samples, and also the druzes of calcium oxalate in the cells of parenchyma have not been found. The stomatal device is of anomocytic type. In D. Stramonium var. inermis (Jaeq.) Lund (white spikeless) sample the quantity of stomata on the top and lower epiderma differs slightly. In the sample of D. Stramonium var. godronii (Danert) hort. (violet spikeless) the quantity of stomata on the lower epidermis exceeds this indicator in comparison with the top by 2-3 times. The epidermis structure of the leaf of the studied samples of a dope ordinary can be of interest both to the systematization, and to diagnostic signs of vegetable raw materials definition.