In recent years, medicinal plants have been used as sources of natural composition and they are used as alternative for
synthetic antioxidants and antimicrobial agents in food and pharmaceutical industry, natural therapy and alternative
medicine. The present regard is the first report on the assessment of chemical composition, antioxidant and antimicrobial
activity of essential oil from the seeds of Nicotiana rustica L. Isolated from Iran. Tobacco seeds were collected from the
tobacco fields in Borazjan city of Iran. Essential oils of the seed of N. rustica were prepared by hydro - distillation using
Clevenger type apparatus during 3 hours after that Qualitative and composition of the oil was determined by GC-MS. The
antioxidant activity of essential oil has been investigated by using DPPH assay method. For antimicrobial activity and
MIC, MBC and MFC of the essential oil Micro broth dilution technique on eight pathogenic bacteria and two fungi has
been used. The results obtained showed the presence of 28 components, in the oil with the highest content of Myristicin
(32.75%) and ar-Turmerone (5.71%). The antioxidant activity of N. rustica oil was IC50 μg/mL = 27.93±0.834. In
addition, oil has shown the best antimicrobial activity on Pseudomonas aeruginosa, Bacillus cereus, E. coli, and
Staphylococcus aureus. The results of antimicrobial assays indicated that the most of examined microorganisms have been
affected in low concentration. Also the essential oil demonstrates strong antioxidant activity but antifungal activity was not
observed