Antioxidant Activity and Chemical Composition of Essential Oils from JordanianOnonis NatrixL. andOnonis SiculaGuss.

The antioxidant activity of the essential oils obtained from Ononis Natrix L. and Ononis Sicula Guss were investigated by the DPPH and ATBS methods. The oils exhibited good to moderate antioxidant activity in a concentration-dependent manner. Essential oils of the two plants were analyzed by GC and GC- MS. Seventy-seven components (95.60 %) were characterized in the essential oil of O. Sicula. The oil was rich in oxygenated sesquiterpenes (66.29...