Morphoanatomical features of artemisia fragrans species
Narmin I Sadigova
As a result of the conducted morphoanatomical studies, a number of characteristic signs of the species A.fragrans Willd. was determined. One of such characteristic signs is the very early transition of the root to the second structure. Roots are consisted of a single-layered rhizoderm. Beneath the rhizoderm, there is a single-layered exoderm, cortex parenchyma, single-layered endoderm and pericycle. The diameter of the central cylinder is equal to 150 μm. The root base of the old plant is visibly particulated as the parenchyma surrounding the wood becomes corky and breaks down over time. The stem is composed of one and two axis trichome epidermis. Below the epidermis, there are hypoderm, collenchyma, endoderm and pericycle cells. There is primary conducting bundles in the central cylinder. At the base of the primary shoots of a plant, dilatation of radical rays and parenchymatization of transition zones of annual layers occur, which in turn leads to particulation of individual parts of the stem. The leaves are covered with uniaxial, long and biaxial short trichomes. Epidermis is composed of single-layered cells. Cell walls are concave and convex. The number of cells on the adaxial surface of the stomata is greater than on the abaxial surface. Mesophile is a isolateral-palisade. The main and lateral vessels are located on the central, transverse surface of the leaf and are surrounded by water-bearing cells. Leaf stalk has a partially wing-like protrusion that is clearly visible in cross-section. Three collateral bundles pass through the leaf stalk. The main vessel is significantly sclerificated. Chlorenchyma developed from the edges of the stalk only in certain parts. As a result of the conducted research, it was determined that the shape and nature of the structural features in Artemisia species is predominantly adaptive.