Antimicrobial activity, antioxidant activity and chemical composition of origanum onites L. and origanum vulgare L. ssp. hirtum (Link) ietswaart from Mugla (Turkey)

Abstract

In this study, antimicrobial activities on the multiple antibiotic resistant strains of Stenotrophomonas maltophilia, an emerging pathogen involved in an increasing number of clinical syndromes, antioxidant activities and chemical compositions of the essential oils of O. onites (Lamiaceae) and O. vulgare ssp. hirtum (Lamiaceae) that have been used in folk medicine in Anatolia, were determined. The essential oils of O. onites and O. vulgare ssp. hirtum were inhibited the growth of all tested bacteria tested and the inhibition zones ranged between 28-32 mm and 26-33 mm, respectively. The major component characterized in the essential oils of these plants are carvacrol (79.32% and 68.19%) and other main components were determined as p-cymene (4.32% and 6.81%) and y-terpinene (3.94% and 4.63%), respectively. In the p-carotene bleaching test, the most active species was the essential oil of O. onites (82.3 %).