Abstract
In order to promote a local Tunisian product, this study was designed to examine, for the first time, the anti-Acanthamoeba activity (Acanthamoeba castellanii Neff) of the essential oils of Tunisian Citrus sinensis peels (Maltese half-blood) and the effect of viroid plant infection on this activity. To do so, three samples of peels’ essential oils were studied: from a healthy plant (Control), a plant inoculated with Citrus exocortis viroid (CEVd) and one inoculated with hot stunt cachexia viroid (HSVd). The samples were extracted by hydrodistillation from dried peels and characterized by GC–MS. Limonene was the major component with a percentage ranging from 90.76 to 93.34% for (CEVd) sample and (Control), respectively. Anti-Acanthamoeba activity of the tested oils was determined by the Alamar Blue® assay. Primary results showed a strong potential anti-Acanthamoeba activity with an IC50 ranging from 36.6 to 54.58 μg/ml for (HSVd) and (CEVd) samples, respectively.In terms of the effect of viroid infection, a strong positive correlation was observed between different chemical classes and anti-Acanthamoeba activity.
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