Chemical composition, antibacterial and antioxidant activities of Lavandula pubescens Decne essential oil from Algeria

摘要

Lavandula pubescens Decne is one of five Lavandula species growing wild in Algeria. The plant is widely used in traditional medicine. In this work, the essential oils of L. pubescens collected from El-mermothia locality in Tebessa (Algeria) were obtained by hydro-distillation, and subjected to antimicrobial and antioxidant assays. The antimicrobial activity was tested using the agar disc diffusion method, by determining the inhibition zone. The most important activity was recorded against Enterococcus faecalis (ATCC 29212) and Escherichia coli (ATCC 25922). The antioxidant activity was assessed using two methods namely DPPH and Reducing power and the results revealed significant potency with IC₅₀values of 17.24μg/mL and 33.38 μg/mL respectively; but still lower than that found for the standard ascorbic acid.(8.86 μg/mL and 20.06 μg/mL)