alexa GC-MS analysis of essential oils from some Greek aromatic plants and their fungitoxicity on Penicillium digitatum.
Pharmaceutical Sciences

Pharmaceutical Sciences

Medicinal & Aromatic Plants

Author(s): Daferera DJ, Ziogas BN, Polissiou MG

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Abstract The isolated essential oils from seven air-dried plant species were analyzed by gas chromatography-mass spectrometry (GC-MS). Thymus vulgaris (thyme), Origanum vulgare (oregano), and Origanumdictamus (dictamus) essential oils were found to be rich in phenolic compounds representing 65.8, 71.1, and 78.0\% of the total oil, respectively. Origanum majorana (marjoram) oil was constituted of hydrocarbons (42.1\%), alcohols (24.3\%), and phenols (14.2\%). The essential oil from Lavandula angustifolia Mill. (lavender) was characterized by the presence of alcohols (58.8\%) and esters (32.7\%). Ethers predominated in Rosmarinus officinalis (rosemary) and Salvia fruticosa (sage) essential oils, constituting 88.9 and 78.0\%, respectively. The radial growth, conidial germination, and production of Penicillium digitatum were inhibited completely by oregano, thyme, dictamus, and marjoram essential oils at relatively low concentrations (250-400 microg/mL). Lavender, rosemary, and sage essential oils presented less inhibitory effect on the radial growth and conidial germination of P. digitatum. Conidial production of P. digitatum was not affected by the above oils at concentrations up to 1000 microg/mL. Apart from oregano oil, all essential oils were more effective in the inhibition of conidial germination than of radial growth. The monoterpene components, which participate in essential oils in different compositions, seem to have more than an additive effect in fungal inhibition.
This article was published in J Agric Food Chem and referenced in Medicinal & Aromatic Plants

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