title: Eucalyptus (gracilis, oleosa, salubris, and salmonophloia) essential oils: their chemical composition and antioxidant and antimicrobial activities.
abstract: Essential oils of four different Eucalyptus species (Eucalyptus salubris, Eucalyptus salmonophloia, Eucalyptus oleosa, and Eucalyptus gracilis) grown in southern Tunisia were screened for their antioxidant and antimicrobial properties as well as their chemical compositions. According to gas chromatography-flame ionization detection and gas chromatography-mass spectrometry analysis, chemical compositions of the Eucalyptus species E. salubris (27 compounds; 99.2%), E. salmonophloia (31 compounds; 99.2%), E. oleosa (32 compounds; 97.6%), and E. gracilis (18 compounds; 97.7%) were identified. In the 1,1-diphenyl-2-picrylhydrazyl assay, the antioxidant activity was in the range of 12.0-52.8 mg/mL, whereas in the 2,2'-azinobis-3-ethylbenzothiazoline-6-sulfonate assay, E. oleosa (176.5 +/- 3.1 mg/L) gave the best inhibition result. To evaluate antimicrobial activity, all essential oils were tested against bacteria (two Gram-positive and two Gram-negative), two yeast, and two fungi. Essential oils exhibited an interesting antibacterial activity against all microorganisms tested (activity was better against Gram-positive bacteria) except for Staphylococcus aureus and Escherichia coli. Correlations between chemical composition and biological and antioxidant activities were studied.
authors.affiliation: Laboratoire de Physicochimie des Matériaux, Institut Préparatoire aux Etudes Scientifiques et Techniques, La Marsa, Tunisia.
authors.forename: Hajer Naceur
authors.initials: HN
authors.lastname: Ben Marzoug
authors.forename: Jalloul
authors.initials: J
authors.lastname: Bouajila
authors.forename: Monia
authors.initials: M
authors.lastname: Ennajar
authors.forename: Ahmed
authors.initials: A
authors.lastname: Lebrihi
authors.forename: Florence
authors.initials: F
authors.lastname: Mathieu
authors.forename: François
authors.initials: F
authors.lastname: Couderc
authors.forename: Manef
authors.initials: M
authors.lastname: Abderraba
authors.forename: Mehrez
authors.initials: M
authors.lastname: Romdhane
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry* / Q000494:pharmacology; D000975:Antioxidants / Q000737:chemistry* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D005052:Eucalyptus / Q000737:chemistry*; D005658:Fungi / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D009822:Oils, Volatile / Q000737:chemistry* / Q000494:pharmacology; D010936:Plant Extracts / Q000737:chemistry* / Q000494:pharmacology; D010938:Plant Oils / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000890:Anti-Infective Agents; D000975:Antioxidants; D009822:Oils, Volatile; D010936:Plant Extracts; D010938:Plant Oils