title: Phytotoxicity and volatile constituents from leaves of Callicarpa japonica Thunb.
abstract: The essential oil from the leaves of Callicarpa japonica was analyzed by GC-MS, and 84 compounds were identified. The main constituents of the essential oil were spathulenol (18.1%), germacrene B (13.0%), bicyclogermacrene (11.0%), globulol (3.3%), viridiflorol (2.6%), alpha-guaiene (2.3%), and gamma-elemene (2.0%). The essential oil constituents of C. japonica were significantly different from those found in our previous work on Callicarpa americana. The oil of C. japonica was selectively phytotoxic to bentgrass compared to lettuce seeds, with 80-100% growth reduction observed at 0.3 mg/ml.
authors.affiliation: Natural Products Utilization Research Unit, USDA-ARS, Box 8048, University, MS 38677, USA. mkobaisy@ars.usda.gov
authors.forename: Mozaina
authors.initials: M
authors.lastname: Kobaisy
authors.forename: Mario R
authors.initials: MR
authors.lastname: Tellez
authors.forename: Franck E
authors.initials: FE
authors.lastname: Dayan
authors.forename: Stephen O
authors.initials: SO
authors.lastname: Duke
mesh_terms: D031703:Agrostis / Q000187:drug effects / Q000254:growth & development; D008401:Gas Chromatography-Mass Spectrometry; D006540:Herbicides / Q000737:chemistry* / Q000302:isolation & purification* / Q000494:pharmacology; D018545:Lactuca / Q000187:drug effects / Q000254:growth & development; D009822:Oils, Volatile / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry*; D012639:Seeds / Q000187:drug effects / Q000254:growth & development; D029648:Verbenaceae / Q000737:chemistry*; D014835:Volatilization
chemical_list: D006540:Herbicides; D009822:Oils, Volatile