Eucalyptus oleosa Essential Oils: Chemical Composition and Antimicrobial and Antioxidant Activities of the Oils from Different Plant Parts (Stems, Leaves, Flowers and Fruits)

Molecules

Hajer Naceur Ben Marzoug¹  Mehrez Romdhane¹  Ahmed Lebrihi¹  Florence Mathieu¹  François Couderc¹  Manef Abderraba¹  Mohamed Larbi Khouja¹ 

[1] ¹Laboratoire de Physicochimie des Matériaux, IPEST, BP51, La Marsa 2070, Tunisia

关键词: Eucalyptus oleosa F. Muell. ex Miq.;    plant parts;    essential oil;    GC-MS;    antioxidant activity;    ABTS;    DPPH;    antimicrobial activity;   

DOI  :  10.3390/molecules16021695

来源: mdpi

【 摘 要 】

Essential oils obtained by hydrodistillation from the different parts (stems, adult leaves, immature flowers and fruits) of Eucalyptus oleosa were screened for their antioxidant and antimicrobial properties and their chemical composition. According to GC-FID and GC-MS, the principal compound of the stem, immature flowers and the fruit oils was 1,8-cineole, representing 31.5%, 47.0% and 29.1%, respectively. Spathulenol (16.1%) and γ-eudesmol (15.0%) were the two principal compounds of adult leaves oil. In the DPPH (1,1-diphenyl-2-picrylhydrazyl) assay, the oils of the four parts showed moderate antioxidant activity. In the ABTS (2,2’-azinobis-3-ethylbenzothiazoline-6-sulphonate) assay, the most active part was the adult leaves, with a IC₅₀ value 13.0 ± 0.6 mg/L, followed by stems (IC₅₀ = 43.5 ± 1.4 mg/L). The essential oils showed a better antibacterial activity against Gram-positive and Gram-negative bacteria, and a significant antifungal activity also was observed against yeast-like fungi. A strong correlations between oxygenated monoterpenes and antimicrobial activity (especially 1,8-cineole) were noted (R² = 0.99, 0.97 and 0.79 for B. subtilis, P. aeruginosa and C. albicans, respectively).

【 授权许可】

CC BY   
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