title: The role of secreting structures position on the leaf volatile organic compounds of Hypericum androsaemum.
abstract: Hypericum androsaemum L. presents typical translucent, essential oil producing glands, which are distributed on the leaf along both margins (margin glands) and on the lamina (lamina glands). The gland secretion was studied by histochemical and chemical analysis; the gland content was sampled directly from the secretory glands, and the volatile organic compounds (VOC) of the margin and lamina glands were separately analyzed. The lipophilic fraction of the lamina glands had as main components: (E)-2-hexenal (15.5%), hexadecanoic acid (14.7%), beta-caryophyllene (11.2%), germacrene B (11.0%) and gamma-himachalene (9.8%). The lipophilic fraction of the margin glands had as its main components: beta-pinene (22.0%), limonene (17.6%), (E)-beta-ocimene (6.1%), methyl linoleate (5.7%), terpinolene (5.4 %), (E)-2-hexenal (4.9%) and alpha-pinene (4.1%).
authors.affiliation: Department of Vegetal Biology, University of Florence, via La Pira 4, 50121 Florence, Italy.
authors.forename: Claudia
authors.initials: C
authors.lastname: Giuliani
authors.forename: Roberto Maria
authors.initials: RM
authors.lastname: Pellegrino
authors.forename: Bruno
authors.initials: B
authors.lastname: Tirillini
authors.forename: Laura
authors.initials: L
authors.lastname: Maleci Bini
mesh_terms: D020902:Hypericum / Q000737:chemistry* / Q000648:ultrastructure; D053147:Plant Exudates / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry / Q000648:ultrastructure; D055549:Volatile Organic Compounds / Q000302:isolation & purification*
chemical_list: D053147:Plant Exudates; D055549:Volatile Organic Compounds