Antibacterial and Antifungal Activities of the Essential Oils of Two Saltcedar Species from Tunisia

Abstract

The chemical composition of the volatile constituents from the flowering parts of Suaeda fructicosa and Limonium echioides were analysed by GC-FID and GC-MS. Sixty-five compounds were identified in L. echioides aerial parts. 48 out of 65 were found common to the aerial part of S. fructicosa. Palmitic acid was found as a predominant compound in both tested halophytic oils. Furthermore, the essential oil was tested against six bacteria and four fungi at different concentrations. Both oils, tested at 0.5 and 0.8 mg ml -1 , inhibited the visible growth of Staphylococcus aureus, Staphylococcus epidermidis, Micrococcus luteus, Escherichia coli and Salmonella typhimurium, but no antibacterial effect was detected against Pseudomonas aeruginosa. Additionally, both halophytic oils failed to show antifungal activity against all the test fungi when applied at 80, 200 and 500 lg/disc.

Identification and characterization of cellular locus of limonin biotransforming enzyme in Pseudomonas putida

“…This might be due to the presence of various low molecular weight constituents in citrus juice serum, which hinder the bacterial activity. Low molecular weight essential oils extracted during extraction are responsible for bacterial inactivation (Saidana et al, 2008). Bacterial inactivation by low molecular weight essential oils obtained from lemon, basil, cinnamon, etc.…”

Evaluación del efecto antibacteriano del látex de Jatropha curcas “piñón” frente a Staphylococcus aureus

“…Pabón et al 23 . También aplicó el mismo método usando extractos obtenidos con solventes éter, diclorometano y etanol; además otros estudios que han empleado la misma metodología obtuvieron que las hojas y raíces poseen actividad antibacteriana, debido a la presencia de fenoles (ácido gálico y pirogalol) y de saponinas y flavonoides [24][25][26] . El efecto antibacteriano se atribuye a la mezcla de los compuestos en mención y su acción en diferentes orgánulos de la célula, por ello no se sabe con exactitud el mecanismo celular antimicrobiano [27][28][29][30][31][32][33][34] .…”

In vitro Evaluation of Antimicrobial and Cytotoxic Activities of Rosmarinus officinalis L. (Lamiaceae) Essential Oil Cultivated from South-West Tunisia

“…Tubes of MHB containing various concentrations of essential oil were inoculated with 10 μl bacterial inoculums adjusted to 10 6 CFU/ml. They were incubated under shaking conditions (100-120 rpm) at 37°C for 24h (Saidana et al, 2008). Control tubes without tested samples were simultaneously assayed.…”