Table 2 Qualitative detection and antimicrobial activity of Gymnema sylvestre leaves
Phytoconstituents | Detected group | Stock solution (mg/ml) | Antimicrobial activity |
|---|---|---|---|
Alkaloids | 31 | ++ d | |
Mayer’s reagent test | +b | ||
Hager’s reagent test | + | ||
Wagner reagent test | + | ||
Flavonoids | 52.25 | +++c | |
Shinoda test (Magnesium turnings) | -a | ||
Zinc–hydrochloride reduction test | + | ||
Lead acetate test | + | ||
Ferric chloride reagent test | + | ||
Saponins | 50 | ++d | |
Froth test | + | ||
Tannins | 142.3 | -f | |
Ferric chloride reagent test | + | ||
Lead acetate test | + | ||
Cardiac glycosides | 54.65 | +++c | |
Keller-killiani test | + | ||
Terpenoids | |||
Triterpenes (Salkowski’s test) | – | NA | – |
Diterpenes (Copper acetate test) | + | 44.4 | ++d |
Anthranol glycosides | |||
Borntrager’s test | + | ND | NA |
Phytosterols | 57.6 | +e | |
Libermann Burchard’s test | + | ||
Salkowski’s test | + | ||
Coumarins | + | ND | NA |