Full Length Research Paper
Phytochemical constituents vis-a-vis histochemical localization of forskolin in a medicinal plant Coleus forskohlii Briq.
Selima Khatun1*, Uğur Çakilcioğlu2 and Narayan Chandra Chatterjee1
1UGC Centre of Advanced Study, Department of Botany, Burdwan University, Burdwan 713104, West Bengal, India.
2Elaziğ Directorate of National Education, Elaziğ 23100, Turkey
Accepted: 03 August 2010 Published: 04 March 2011
Tannins, phlobatannins, saponins, flavonoids, terpenoids, cardiac glycosides and alkaloids distribution in Coleus forskohlii belonging to the family Lamiaceae a well known medicinal plant in India was examined. Qualitative analysis carried out on this plant shows that terpenoids, tannins, flavonoids, phlobatannins, saponins and cardiac glycosides were present in C. forskohlii. The phytochemical constituents with respect to the role of this plant in traditional medicine treatment have well been established. Forskolin, a diterpene compound is the active principle of the C. forskohlii. Histochemical test was done to locate the forskolin in roots and tubers of C. forskohlii. Forskolin was found in the cells of cork, cortex, medullary rays and xylem in roots and tubers of C. forskohlii. These yellowish and reddish-brown masses are of diagnostic importance for this drug plant and can be used for its characterization.
Key words: Coleus forskohlii, phytochemical constituents, forskolin, histochemical localization.