Introduction: Iran is one of the greatest and the most divergent resources of medicinal plants. Cuminum cyminum is one of the important and valuable medicinal plants of our country with such medical effects as anti-seizure, anti- epilepsy, stomach-strengthening, diuretic, anti-flatulence and maldigestion. The aim of this research is to assess the chemical components and antioxidant effects of the seed essence of this plant. Methods: The seed essence from southwest mountains of Behabad, Yazd was extracted by Clevenger apparatus, then segregation and recognition of components was performed by Gas Chromatography(GC) and Gas Chromatography-Mass Spectrometry(GC-MS) methods. The DPPH test was used for estimating antioxidant effects and Follin-Ciocalteu method was used for estimating the quantity of phenol compounds. This study was an applied research. Results: Components identification revealed that propanal (26.19%), 1-phenyl-1-butanol (16.49%), γ-Terpinene (13.04%) and benzene methanol (25.4%) had the highest percentage in the essence. The antioxidant test showed a high antioxidant effect with IC50 of 1.49 µg/mg and a high phenolic component percentage of about 162.62 mg/g. Conclusion: The propanal, the main component of seed essence, has a wide range of applications in industries and pharmacy. The result of this research showed a much higher antioxidant activity for native Cuminum Cyminum of Yazd province comparing the previous similar studies about this plant in other areas.

Keywords: Cuminum; Plants Medicinal; Plant Components, Aerial; Antioxidant; Yazd, Iran

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