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In vitro propagation of the wild carrot Daucus carota L. subsp. halophilus (Bro...
Tavares, Ana Cristina; Salgueiro, Lígia R.; Canhoto, Jorge M.Daucus carota subsp. halophilus, is a wild crop relative of domestic carrot. It is an aromatic plant widely used in folk medicine due to recognized therapeutic properties of its essential oils. Experiments were carried out to evaluate the potential of in vitro propagation techniques to the conservation of this endemic and endangered taxon. The results showed that shoot tips of in vitro germinated seeds were abl...
Micromorphology of trichomes and composition of essential oil of Teucrium capit...
Antunes, Teresa; Sevinate-Pinto, Isabel; Barroso, José G.; Cavaleiro, Carlos; Salgueiro, Lígia R.The morphology and distribution of the glandular trichomes of Teucrium capitatum L., as well as the chemical composition of the essential oils, were studied. Important differences were found with regard to the major constituents of the essential oils of five populations of T. capitatum grown in Portugal. The oil isolated from one population was characterized by a high content of oxygenated monoterpenes (33.0%),...
Composition of the essential oil and micromorphology of trichomes of Teucrium s...
Cavaleiro, Carlos; Salgueiro, Ligia R.; Antunes, Teresa; Sevinate-Pinto, Isabel; Barroso, José G.The morphology, distribution and release mechanism of the glandular trichomes of Teucrium salviastrum Schreber were studied, along with the chemical composition of the essential oils. Peltate and capitate trichomes are present on both vegetative and reproductive organs. In this study, particular emphasis is given to the capitate trichomes with long multicellular stalks. These trichomes are very abundant, and th...
Essential oil composition and variability of Thymus lotocephalus and Thymus×mourae
Salgueiro, Lígia R.; Vila, Roser; Tomàs, Xavier; Cañigueral, Salvador; Paiva, Jorge; Cunha, António Proença da; Adzet, TomàsThe composition of the essential oils of four populations of Thymus lotocephalus G. López and R. Morales and one population of T.×mourae Paiva and Salgueiro, two endemic taxa from Portugal, was investigated mainly by GC and GC-MS. T×mourae is a natural hybrid between T. lotocephalus and T. mastichina (L.) L. subsp. donyanae R. Morales, which essential oil was analysed for the first time. In its oil, it was poss...
Chemotaxonomic study on Thymus villosus from Portugal
Salgueiro, Lígia R.; Vila, Roser; Tomàs, Xavier; Cañigueral, Salvador; Paiva, Jorge; Cunha, António Proença da; Adzet, TomàsThe composition of the essential oils of four populations of Thymus villosus subsp. lusitanicus (Boiss.) Coutinho from Portugal was investigated by GC and GC-MS. To study the chemical polymorphism the results obtained from GC analyses of the volatile oils from individual plants from four populations were submited to Principal Component and Cluster analyses. A comparision with the essential oil of T. villosus su...
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