Abstract
ObjectiveTo explore the phytochemical constituents of the methanolic flower extracts of Helictres isora (H. isora), Spathodea campanulata (S. campanulata), Antigonon leptopus (A. leptopus) and Thunbergia grandiflora (T. grandiflora). MethodsThe preliminary phytochemical screening was performed by Harborne method. ResultsThe results of the phytochemical screening revealed that alkaloids, phenol, tannins, xanthoproteins, carboxylic acid, coumarins and carbohydrates presence in the methanolic extracts of H. isora. The methanolic extracts of S. campanulata displayed the presence of alkaloids, phenol, coumarins and carbohydrates. The phenol, saponins, aminoacids, steroids, phytosterols, triterpenoids, sapogenis, tannins, xanthoprotein, carboxylic acid and coumarins were present in the methanolic extracts of A. leptopus. The methanolic extracts of T. grandiflora showed only the alkaloids and phenols presence and other constituents were failed to demonstrate in the methanolic extracts of T. grandiflora. ConclusionsThe antimicrobial activity of H. isora, S. campanulata, A. leptopus and T. grandiflora may be due to one/more group of above phyto-constituents. From the results, it can be concluded that the methanolic flower extracts of H. isora, S. campanulata, A. leptopus and T. grandiflora may be used as broad-spectrum antimicrobial, bioactive agent after extensive investigation.
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