Alkaloids, some constituents and anti-microbial activity of convolvulus arvensisl

Abstract EN

The three organs of Convolvulus arvensis L.

(flower, green parts and root) were phytochemically screened.

The results revealed the presence of sterols and / or triterpenes, carbohydrates and/or glycosides, proteins and / or amino acids, coumarins, flavonoids, alkaloids and /or nitrogenous base and traces of tannins.

Some pharmacopoeial constants were determined.

Free sugars and pectin substances were studied after hydrolysis by using Paper Chromatography (PC) and Thin Layer Chromatography (TLC) techniques.

Percentage of crude protein, were found to be 25.00%, 43.65% and 18.75 % for flower, green parts and root, respectively.

Compound, free and total amino acids were identified qualitatively using PC and TLC, and quantitatively by using amino acid analyzer.

Aspartic acid showed the highest concentration (18.8%) in green parts, followed by Valine (5.45%) in flower and Phenyl alanine (5.71%) in root.

While Alanine has the lowest concentration in both roots and flowers (0.01% and 0.32%, respectively) but in green parts it was Cystine (0.50%).

Total alkaloids estimated by three methods; acid-base titration, non aqueous titration and gravimetric results were found to be 0.091, 0.10 and 0.12 % for flower, green parts and root respectively calculated as tropine.

Tropine, choline hydrochloride and betain hydrochloride were isolated and identified by using IR, 13C-NMR and 1HNMR.

Anti-microbial screening were carried out for the different plant organ extracts and showed broad activity against some bacterial and fungus strains.