Abstract
Medicinal and aromatic plants are garnering an increasing interest in industry, academia and health sciences. In passing from plant production to the bioactive product used by Human, many research studies are involved. The current research aimed to determine the chemical composition and to evaluate the antimicrobial effects of the essential oil extracted from the black psyllium (Plantago afra L.). The aerial parts essential oil obtained by hydrodistillation was analyzed using gas chromatography coupled to mass spectrometry (GC–MS) and flame ionization detection (GC-FID), whereas the microdilution technique was developed to evaluate its antimicrobial efficacy. The main identified constituents were thymol (14.3%), 3-[4-(t-Butyl) phenyl] furan-2,5‑dione (12.7%), palmitic acid (8.9%) and eudesmane (4.7%). The antimicrobial activities were assessed against five standard bacterial strains: Escherichia coli (ATCC 8739), Salmonella enterica (CIP 8039), Pseudomonas aeruginosa (ATCC 9027), Staphylococcus aureus (ATCC 6538) and Bacillus subtilis (ATCC 6633) along with the yeast Candida albicans (ATCC 30031). The results demonstrated that the effective Plantago afra essential oil could be potentially utilised in controlling some phytopathogenic fungi and bacteria.
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