Chemical composition and antimicrobial and antioxidant activity of Helichrysum italicum (Roth) G.Don subspecies essential oils

Authors : Silviya MOLLOVA, Hafize FİDAN, Daniela ANTONOVA, Dimitar BOZHİLOV, Stanko STANEV, Iliana KOSTOVA, Albena STOYANOVA

Pages : 371-378

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Publication Date : 2020-08-01

Article Type : Research Paper

Abstract :The chemical composition and the antimicrobial and antioxidant activity of essential oils from two Helichrysum italicum insert ignore into journalissuearticles values(Roth); G.Don subspecies grown in Bulgaria were investigated. As a result, 95 compounds with concentrations above 0.05% were detected by GC/MS and 46 of them, mainly mono- and sesquiterpenes, representing 79.81% and 85.51% of the total content of the samples, were identified. The main constituents of the essential oil from Helichrysum italicum subsp. microphyllum insert ignore into journalissuearticles values(plant origin from Bosnia); were monoterpene alpha-pinene insert ignore into journalissuearticles values(20.84%); and sesquiterpene gamma-curcumene insert ignore into journalissuearticles values(16.53%);, followed by beta-selinene insert ignore into journalissuearticles values(5.59%);, ar-curcumene insert ignore into journalissuearticles values(4.39%);, trans-caryophyllene insert ignore into journalissuearticles values(4.35%);, beta-diketone italidione I insert ignore into journalissuearticles values(4.32%);, alpha-selinene insert ignore into journalissuearticles values(4.28%);, and neryl acetate insert ignore into journalissuearticles values(3.81%);. The sesquiterpene hydrocarbons were the dominant groups of chemical constituents in the essential oil, followed by the oxygenated aliphatic hydrocarbons. The main constituents in the H. italicum essential oil insert ignore into journalissuearticles values(plant origin from France); were neryl acetate insert ignore into journalissuearticles values(33.87%);, gamma-curcumene insert ignore into journalissuearticles values(8.84%);, rosifoliol insert ignore into journalissuearticles values(5.46%);, geranyl propionate insert ignore into journalissuearticles values(4.98%);, alpha r-curcumene insert ignore into journalissuearticles values(4.31%);, italidione I insert ignore into journalissuearticles values(3.56%);, alpha-eudesmol insert ignore into journalissuearticles values(3.19%);, and limonene insert ignore into journalissuearticles values(3.02%);. The main class of chemical compounds was the oxygenated monoterpenes, followed by sesquiterpene hydrocarbons. H. italicum essential oil from France showed more pronounced antimicrobial activity against the Gram-positive bacteria Staphylococcus aureus and Bacillus subtilis, and the fungus Aspergillus brasiliensis, as well as stronger antioxidant potential.
Keywords : Helichrysum italicum Roth, G Don, essential oils, gas chromatography mass spectrometry, chemical profile, antibacterial, antioxidant activity