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Fresh, shade-dried and powdered samples of leaf, stem and root of Chitrak (Plumbago zeylanica L) were subjected to fractional distillation in a Soxhlet apparatus using four organic solvents. Chloroform, acetone and ethanol extracts from root of Plumbago showed higher zone of inhibition of 22.66±1.52, 21.5±1.29 and 16.5±1.29 mm and minimum inhibitory concentration (MIC) of 1.0, 10.0 and 10.0 μg/ml, respectively against Escherichia coli. Root and leaf extracts by ethanol, chloroform and acetone showed higher antibacterial activity against E. coli as compared to standard Kanamycin (MIC-100 μg/ml). The high performance thin layer chromatography (HPTLC) fingerprints were used for the quantitation of two bioactive markers: gibberellic acid and quinol R in the plant powder of different organs. Maximum content of gibberellic acid was found in acetone extract of the root (59.74%, Rf 0.79) followed by methanol root extract (53.01%). HPTLC provides a chromatographic fingerprint of phytochemicals and is suitable for confirming the identity and purity of medicinal plant raw materials.   Key words: Plumbago zeylanica, antimicrobial property, bioactive compound, kanamycin, Escherichia coli, high performance thin layer chromatography (HPTLC), phytochemical fingerprint.

journal of medicinal plant research

Development of phytochemical fingerprint of an Indian medicinal plant Chitrak (Plumbago zeylanica L) using high performance thin layer chromatography (HPTLC)