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Quality Assessment Profile of the Leaves of Tecoma stans L
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| Author:
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SORABH AGRAWAL, VENKATACHALAM KARTHIKEYAN
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| Abstract:
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To explore the micro morphology and physio chemical parameters of the leaves of Tecoma stans L. (Bignoniaceae). Macroscopy, microscopy, physicochemical analysis, preliminary phytochemical screening and other WHO recommended parameters for standardizations were performed. Leaves are opposite, compound and imparipinnate with 2 to 5 pairs of leaflet and a larger single terminal leaflet. Leaflet is lanceolate up to 10cm in long with serrate margin, mild green in colour. Microscopic evaluation revealed the abaxial epidermis is stomatiferous, the stomata are actinocytic type. Each stoma has 5-10 µm, wedge shaped radiating subsidiary cells all ground the guard cells are elliptic with wide opening. The vascular system is quite prominent and occupies entire midrib. It consists of a wide deep bowl shaped main strand and a flat thick adaxial plate of strand. The trichome has a short central stalk, and a thin plate of glandular cells, lateral vein surrounded by a thin layer of parenchyma cells which extend in to adaxial vertical pillar of cells. Vein islet numbers, vein termination numbers, stomatal number, stomatal index and other physico chemical tests like ash values, loss on drying, extractive values were determined. Preliminary phytochemical screening showed the presence of alkaloids, tannins, saponin, flavonoids, carbohydrates and absence of proteins and aminoacids, mucilage, glycosides, volatile oil, sterols, terpenoids and fixed oil. Microscopic analysis was informative and provides useful information in the botanical identification, standardization for purity & quality and immense value in authentication of the leaf.
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| Keyword:
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Tecoma stans, Bignoniaceae, Microscopical evaluation, Physicochemical analysis.
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| DOI:
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