Antibacterial and Antioxidant Activity of Essential Oils from Citrus spp

The antibacterial and antioxidant activities of essential oils from Bitter orange, Sweet orange, Lemon and Mandarin were investigated. The antimicrobial capability of these oils was determined against ten strains of Gram-negative and Gram-positive bacteria, including some phytopathogenic strains. Th...

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Bibliographic Details
Published in:The Journal of essential oil research 2011, Vol.23 (1), p.27-31
Main Authors: Frassinetti, S, Caltavuturo, L, Cini, M, Della Croce, C.M, Maserti, B.E
Format: Article
Language:English
Subjects:
antibacterial activity
antioxidant activity
Citrus aurantium
Citrus limon
Citrus reticulata
Citrus sinensis
essential oil composition
Rutaceae
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Summary:The antibacterial and antioxidant activities of essential oils from Bitter orange, Sweet orange, Lemon and Mandarin were investigated. The antimicrobial capability of these oils was determined against ten strains of Gram-negative and Gram-positive bacteria, including some phytopathogenic strains. The antibacterial activity of the oils was expressed as minimum inhibitory concentrations (MICs). All oils showed good antibacterial activity against both Gram-negative and Gram-positive bacteria. The MICs for selected oils ranged 15–250 μg/mL. The lowest MICs were 15 μg/mL and 20 μg/mL against Xanthomonas citri strains, respectively. The antioxidant and antiradical scavenging properties of the selected oils were tested by means of 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. All examined oils exhibited a free radical scavenging activity, ranging 20–70% of DPPH inhibition. Lemon oil showed the most antioxidant capacity, with DPPH inhibition rate of 70%.
ISSN:1041-2905
2163-8152
DOI:10.1080/10412905.2011.9700427