Comparative study of volatile oil content and antimicrobial activity of pecan cultivars growing in Egypt

Abstract

The volatile oils obtained from the leaves of four pecan cultivars growing in Egypt were evaluated for their chemical composition and antimicrobial activity. The selected cultivars (cv.) were Carya illinoinensis (Wangneh.) K. Koch. cv. Wichita, C. illinoinensis cv. Western Schley, C. illinoinensis cv. Cherokee, and C. illinoinensis cv. Sioux. The gas chromatography-mass spectrometry analyses revealed that the volatile oils from samples of the different cultivars differ in composition and percentage of their components. ?-Curcumene was found as the major constituent of the cv. Wichita oil, whereas germacrene D was the major component of cv. Sioux, cv. Cherokee, and cv. Western Schley. The antimicrobial activity was assayed using the Kirby-Bauer Method by measuring the zone of inhibition of growth. All volatile oils displayed an antimicrobial activity against the tested bacterial strains. On the other hand, only the volatile oil of cv. Wichita showed an antifungal effect on Aspergillus flavus. This work has identified candidates of volatile oils for future in vivo studies to develop antibiotic substitutes for the diminution of human and animal pathogenic bacteria. Nevertheless, the variations of the volatile oil components and antimicrobial potencies of the different studied cultivars, necessitate identifying the cultivars used in future studies. � 2013 Mary Ann Liebert, Inc., and Korean Society of Food Science and Nutrition.

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Keywords

October University for Modern Sciences and Arts, جامعة أكتوبر للعلوم الحديثة والآداب, University of Modern Sciences and Arts, MSA University, ?-curcumene8Carya illinoinensis, Anti-bacterial, Anti-fungal, Germacrene D, alpha acoradiene, alpha ylangene, amphotericin B, antibiotic agent, aromandrene, beta acoradiene, beta curcumene, beta farnesene, beta pinene, bourbonene, cedrene, cineole, copaene, delta cadinene, essential oil, gamma bisabolene, gamma gurjunene, gamma muurolene, germacrene D, guaiol, limonene, longifolene, pinene, salicylic acid methyl ester, terpene derivative, terpenoid, terpenoid derivative, tetracycline, unclassified drug, unindexed drug, viridiflorol, animal experiment, antibacterial activity, antifungal activity, antimicrobial activity, article, Aspergillus flavus, Bacillus subtilis, bacterial strain, Candida albicans, chemical analysis, chemical composition, controlled study, cultivar, disk diffusion, drug determination, drug potency, drug screening, Egypt, Enterococcus faecalis, Escherichia coli, fungal strain, genotype, growth inhibition, hydrodistillation, in vivo study, mass fragmentography, Neisseria gonorrhoeae, nonhuman, pecan, plant growth, plant leaf, priority journal, Pseudomonas aeruginosa, Staphylococcus aureus, Animals, Anti-Bacterial Agents, Antifungal Agents, Aspergillus, Bacteria, Carya, Egypt, Gas Chromatography-Mass Spectrometry, Humans, Microbial Sensitivity Tests, Oils, Volatile, Plant Leaves, Sesquiterpenes, Germacrane, Species Specificity

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