Antimicrobial and antioxidant properties of Lamium galactophyllum boiss & reuter, L. macrodon boiss & huet and L. amplexicaule from Turkish flora

Some Lamium species have been used in folk medicine worldwide in the treatment of several desorders. This work aimed to screen the possible antimicrobial and antioxidant properties as well as total phenolic, resveratrol and flavonoid contents of extracts of three different Lamium species. According to analysis results the highest total phenolic concent was determined at Lamium galactophyllum (112.87 mg GAE/g extre). Quercetin and katesin were the major flavonoid contents for Lamium galactophyllum (respectively 296.7 and 323.35 ?g/ mL), Lamium macrodon (respectively 445.75 and 338.6 ?g/mL) and Lamium amplexicaule (respectively 101.6 and 330.9 ?g/mL). ABTS free radical scavenginig activity of plant extracts was higher than DPPH free radical scavenginig activity, but all plant extracts had free radical scavenging activity against DPPH and ABTS. Lamium galactophllum and Lamium macrodon exhibited more effective antimicrobial activity than Lamium amplexicaule. These results suggested that Lamium species used in this work had antimicrobial and antioxidant properties