Morphological-anatomic analysis of the medicinal plant raw material of the herb Daucus carota
Abstract
Daucus carota (wild carrot ) is a wild plant with unlimited resources used in pharmacology. Its medicinal raw materials are fruits ( Fructus dauci ), but inflorescences and leaves have various biologically active substances. There is a need for their detailed study. The research study aims to describe in detail this biennial herb's anatomical and morphological characteristics, which are promising for phytotherapeutic use. The D. carota leaves are short-petiolate, deep green, oblong in outline, three times pinnately dissected, with incised-toothed lobes, pubescent with one-, rarely two-, three-celled sharp hairs. Up the shoot, the leaves are sessile, forming a sheath; their terminal lobes gradually become oblong. The epidermis on the lower side of the leaf has rectangular cells with slightly curved walls and a diacytic stomatal apparatus. Under it lies the collenchyma. Along the veins are pointed, one-celled, warty hairs. The epidermis on the upper side is formed from small polygonal, cells; stomata are single. Columnar parenchyma is formed by 1 – 2 rows of elongated cells. The spongy tissue consists of wide, irregularly shaped cells that do not fit tightly together. There is a layer of special cells in which assimilates accumulate at the border between the spongy and palisade tissues. The conducting bundle is closed, bilateral, surrounded by sheath cells. The inflorescence is a compound umbel, each ray forming a secondary umbel. At the base of the compound umbel there is a spathe of pinnately dissected leaves. The marginal flowers of the outer umbels have petals of different sizes, incised into unequal lobes, with veins, yellowish-white with pink edges. In the inner flowers of the umbels and the inner umbels of the complex inflorescence, the flowers have five identical, broadly oval, white petals , incised in the middle, and curved upwards. Their epidermal cells are oval, large, with nuclei and papillary hairs. Since a high content of coumarins and pyrocatechins was found in the inflorescence of D. carota , the diagnostic features of its medicinal raw material ( the herb ) were described for further scientific research, writing a monograph for the European Pharmacopoeia and creating new herbal medicines based on it.References
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