alpha-copaene and alpha-pinene

The chemical composition and biological activity of essential oils isolated from the leaves of

Topics: Anti-Bacterial Agents; Bicyclic Monoterpenes; Bridged Bicyclo Compounds; Cyclohexane Monoterpenes; Cyclohexenes; Gram-Negative Bacteria; Gram-Positive Bacteria; Microbial Sensitivity Tests; Monoterpenes; Oils, Volatile; Rainforest; Sesquiterpenes; Zingiberaceae

The volatile profiles (VOC) and the essential oil (EO) composition from the aerial parts of Salvia broussonetii were analysed. Sesquiterpene hydrocarbons dominate the VOCs from leaves (95.7%) and flowers (67.6%), followed by monoterpene hydrocarbons (2.6 and 29.7%, respectively). The main common compounds are germacrene D, β-bourbonene, α-pinene, α-copaene and α-gurjunene, even if with divergent relative abundances. In the leaf EOs the sesquiterpenes prevail, even if not overwhelmingly (about 50.0%), followed by monoterpenes (23.0-35.0%) and by minor fractions of diterpene hydrocarbons and non-terpene derivates. The most abundant common compounds across the two sampling periods are α-pinene, β-pinene, isobornyl acetate, α-gurjenene, germacrene D and bifloratriene. A morphological characterisation of the trichomes responsible for the productivity in terpenes was also performed. Four different morphotypes were observed on the above ground organs of S. brussonetii: peltates and capitates of type II and III resulted the only producers of volatile substances.

Topics: Bicyclic Monoterpenes; Bridged Bicyclo Compounds; Flowers; Microscopy, Electron, Scanning; Monoterpenes; Odorants; Oils, Volatile; Plant Components, Aerial; Plant Leaves; Salvia; Sesquiterpenes; Sesquiterpenes, Germacrane; Trichomes; Volatile Organic Compounds