Chemical composition, total phenolic content and antimicrobial activities of Zhumeria majdae

Zhumeria majdae is a rare an endemic medicinal plantspecies grown wild in Iran. The hydro distilled essential aerial part oil of Z. majdae analysed by GC–MS. Thirty-one compounds representing 95.36% of the aerial part oil, respectively, were identified, of which linalool (48.14%), camphor (20.71%), limonene (4.83%), trans-linalool oxide (2.69%), 3-Octanone (2.34%), terpinene-4-ol (2.30%), camphene (1.88%), caryophyllene oxide (1.34%), geraniol (1.23%), α-pinene (1.22%), p-Cymene (1.08%) were the major compounds. Total phenolic content was 42.74 mg GAE/g dw and the IC50 in the radical scavenging assay was 32.08 mg/ml. The hydro distilled essential aerial part oil display potential of antibacterial activity against the tested 8 phytopathogenic bacterial such as Bacillus cereus, Bacillus thuringiensis, Enterococcus faecalis, Staphylococcus epidermidis, Salmonella typhimurium, Campylobacter jejuni, Klebsiella pneumoniae and Pseudomonas fluorescens. The inhibition zones and MIC values for all test strains, which were sensitive to the essential oil of Z. majdae were in the range of 33-30 mm and 0.93 mg/ml, respectively. The results support the traditional usage and also possible use of Z. majdae essential oil and extracts in the food, pharmaceutical and cosmetic industries.