Journal
MOLECULES
Volume 26, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/molecules26113412
Keywords
citrus; essential oil; GC-MS; antibacterial; antioxidant
Funding
- Foundation of Jiangxi Province Educational Committee [KJLD14079]
- Science and Technology Planning of Ganzhou City
Ask authors/readers for more resources
This study investigated the chemical composition, antibacterial, and antioxidant activities of essential oils extracted from various citrus fruits. Monoterpene hydrocarbons, particularly limonene, were found to be the major components in all citrus essential oils. The results showed that kumquat essential oil exhibited the best inhibitory effect against certain bacteria, while Nanfeng mandarin essential oil had the highest antioxidant activity. Additionally, the antibacterial activities of the essential oils did not seem to be correlated with their antioxidant activities.
Nanfeng mandarins (Citrus reticulata Blanco cv. Kinokuni), Xunwu mandarins (Citrus reticulata Blanco), Yangshuo kumquats (Citrus japonica Thunb) and physiologically dropped navel oranges (Citrus sinensis Osbeck cv. Newhall) were used as materials to extract peel essential oils (EOs) via hydrodistillation. The chemical composition, and antibacterial and antioxidant activities of the EOs were investigated. GC-MS analysis showed that monoterpene hydrocarbons were the major components and limonene was the predominate compound for all citrus EOs. The antibacterial testing of EOs against five different bacteria (Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Salmonella typhimurium) was carried out using the filter paper method and the broth microdilution method. Kumquat EO had the best inhibitory effect on B. subtilis, E. coli and S. typhimurium with MIC (minimum inhibitory concentration) values of 1.56, 1.56 and 6.25 mu L/mL, respectively. All citrus EOs showed the antioxidant activity of scavenging DPPH and ABTS free radicals in a dose-dependent manner. Nanfeng mandarin EO presented the best antioxidant activity, with IC50 values of 15.20 mg/mL for the DPPH assay and 0.80 mg/mL for the ABTS assay. The results also showed that the antibacterial activities of EOs might not be related to their antioxidant activities.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available