Abstract: Antibacterial activities and antioxidant activities of the volatile oil of Cymbopogon citrates from Hunan,Guangdong,Zhejiang,Fujian and Hainan were studied in this article,it provided the basis for further development and utilization of the volatile oil from Cymbopogon citrates.Antibacterial activities of the volatile oil were determined through Oxford cup method and tubes serial dilution method,the antioxidant activities were also evaluated based on the total antioxidant,hydroxyl radical,and scavenging DPPH radical activities.The results revealed that the volatile oil from Cymbopogon citrates had inhibitory effects on Escherichia coli,Staphylococcus aureus,Bacillus subtilis,Salmonella enteric,Shigella Castellani,Candida albicans,Penicillium citrinum and Aspergillus niger;and there were differences in the inhibitory abilities of volatile oil from different regions.All of the volatile oil from five different regions had the total antioxidant,scavenging OH radical and DPPH radical capacities,which increased with the increase of the concentration.There were some differences in the antioxidative activities of the volatile oil from different regions.

Key words: Cymbopogon citrates；volatile oil；regions；antibacterial activities, antioxidative activities