RESUMEN
The essential oil from the different parts (inflorescences, stems + leaves and roots) of Eryngium glaciale Boiss. gathered in Sierra Nevada (Spain) has been extracted by steam distillation and analysed by gas chromatography and gas chromatography coupled to mass spectrometry. Quantitative but not qualitative differences have been found between the analysed parts. The principal compounds from the inflorescences oil were found to be phyllocladene isomer (43.5%), (E)-caryophyllene (15.2%) and valencene (11.5%), while the oil from stems and leaves only showed phyllocladene isomer (41.3%) as main one. The oil from the roots presented phyllocladene isomer (49.4%) and linalool (19.1%) as major constituents. This is the first report on the chemical composition of this species.
Asunto(s)
Eryngium/química , Aceites Volátiles/química , Cromatografía de Gases , Cromatografía de Gases y Espectrometría de Masas , EspañaRESUMEN
The essential oil extracted from the different parts of Eryngium bourgatii Gouan: stems + leaves (E.b.SL), inflorescences (E.b.I) and roots (E.b.R), have been extracted by steam distillation and analysed by gas chromatography (GC) and gas chromatography coupled to mass spectrometry (GC-MS). Quantitative but not qualitative differences have been found between the analysed parts. The principal compounds from the inflorescences oil were found to be phyllocladene (37.6%) and bicyclogermacrene (15.1%), while the oil from stems and leaves showed phyllocladene (20.4%), gamma-muurolene (11.8%) and (E)-caryophyllene (10.1%) as main ones. The oil from the roots presented gamma-muurolene (15.4%) and phyllocladene (15.0%) as major constituents. It is worth mentioning the presence of a diterpene, phyllocladene, as main compound of the essential oil. This is the first report on the essential oil of this species.
Asunto(s)
Eryngium/química , Aceites Volátiles/análisis , Cromatografía de Gases , Diterpenos/análisis , Flores/química , Cromatografía de Gases y Espectrometría de Masas , Hojas de la Planta/química , Raíces de Plantas/química , Tallos de la Planta/químicaRESUMEN
The antifungal activity of the essential oil of the aerial parts of Bupleurum gibraltarium was evaluated against Plasmopara halstedii. Fungus spores were inoculated in sunflower seedlings, previously treated with several essential oil solutions, and the sporulation percentage was measured after an 11-day treatment. The oil at a concentration of 5.0 mL/L clearly inhibited the fungus sporulation. The contact between fungus sporangia and essential oil was minimized, so it seems that the oil pretreatment could activate the defense response of the sunflower seedlings against the pathogen invasion. The main compounds in the oil were sabinene (31.1%), alpha-pinene (15.6%), and 2,3,4-trimethylbenzaldehyde (10.9%), among a total of 65 components identified.
Asunto(s)
Bupleurum/química , Hongos/efectos de los fármacos , Fungicidas Industriales/farmacología , Helianthus/microbiología , Aceites Volátiles/farmacología , Oomicetos/efectos de los fármacosRESUMEN
The essential oil of the leaves and stems of Meum athamanticum Jacq., has been extracted by steam distillation and analysed by gas chromatography (GC) and gas chromatography coupled to mass spectrometry (GC-MS). The monoterpene fraction was predominant while the sesquiterpene one was practically absent. The principal constituents have been identified as (E)-beta-ocimene (29.6%), gamma-terpinene (17.9%), terpinolene (17.0%) and p-cymene (9.7%). Our results show that the chemical composition of the essential oil obtained of the leaves and stems of M. athamanticum from Spain is different to that obtained from plants of Germany, Italy and France.
Asunto(s)
Apiaceae/química , Aceites Volátiles/análisis , Hojas de la Planta/química , Tallos de la Planta/química , Cromatografía de Gases y Espectrometría de MasasRESUMEN
From Bartramia ithyphylla the following five biflavonoids were isolated: philonotisflavone, 2,3-dihydrophilonotisflavone, dicranolomin, 5',3'''-dihydroxyamentoflavone and 5'-hydroxyamentoflavone.
