title: Secretory structures and essential oil composition in Stachys officinalis (L.) Trevisan subsp. officinalis (Lamiaceae) from Italy.
abstract: The secretory structures and the volatile fraction of Stachys officinalis (L.) Trevisan subsp. officinalis (Lamiaceae) from Italy were studied for the first time. Peltate and small capitate trichomes were observed on the whole plant (leaves and inflorescences). In the peltate trichomes, an unusual polyphenols content was evidenced by the histochemical methods. The volatile fraction was obtained by a solvent extract from the distillation water of leaves and inflorescences and analysed by GC-MS. Forty-four constituents for leaves, representing 94.1% of the total volatiles, and 57 compounds for flowers, accounting for 90.1% of the total volatiles, were identified. (E)-caryophyllene (20.1%), (E)-nerolidol (14.3%), caryophyllene oxide (6.1%) and γ-cadinene (5.7%) were recognised as the main constituents for the leaf volatile fraction, while caryophyllene oxide (16.5%), (E)-nerolidol (15.4%), humulene epoxide II (9.2%) and α-pinene (7.0%) were the main compounds for the flower volatile fraction.
authors.affiliation: a Department of Pharmaceutical Sciences , University of Milan , Milan , Italy.
authors.forename: Claudia
authors.initials: C
authors.lastname: Giuliani
authors.affiliation: b Department of Chemistry, Biology and Biotechnology , University of Perugia , Perugia , Italy.
authors.forename: Roberto Maria
authors.initials: RM
authors.lastname: Pellegrino
authors.affiliation: b Department of Chemistry, Biology and Biotechnology , University of Perugia , Perugia , Italy.
authors.forename: Roberta
authors.initials: R
authors.lastname: Selvaggi
authors.affiliation: c Department of Biology , University of Florence , Florence , Italy.
authors.forename: Corrado
authors.initials: C
authors.lastname: Tani
authors.affiliation: d Department of Biomolecular Sciences , University of Urbino , Urbino , Italy.
authors.forename: Bruno
authors.initials: B
authors.lastname: Tirillini
authors.affiliation: c Department of Biology , University of Florence , Florence , Italy.
authors.forename: Laura
authors.initials: L
authors.lastname: Maleci Bini
mesh_terms: D035264:Flowers / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D007558:Italy; D009822:Oils, Volatile / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry; D031366:Stachys / Q000737:chemistry* / Q000648:ultrastructure*; D064201:Trichomes / Q000648:ultrastructure
chemical_list: D009822:Oils, Volatile
keywords: GC-MS analysis; Lamiaceae; Stachys officinalis; glandular trichomes; micromorphology; volatiles