Search results for "Centaurea"
showing 10 items of 89 documents
Volatile constituents of aerial parts ofCentaurea sibthorpii(Sect. Carduiformes, Asteraceae) from Greece and their biological activity
2008
The volatile constituents of the aerial parts of Centaurea sibthorpii [Sect. Carduiformes, Asteraceae] collected in Greece were extracted by hydrodistillation and analysed by GC and GC-MS. Altogether 63 components were identified. Fatty acids and sesquiterpenoidic compounds were the most abundant components in the oil. A study on the biological activity of the oil showed no action against Gram-positive and Gram-negative bacteria.
Volatile components from flower-heads of Centaurea nicaeensis All., C. parlatoris Helder and C. solstitialis L. ssp. schouwii (DC.) Dostál growing wi…
2008
The volatile constituents of the flowerheads of Centaurea nicaeensis All., C. parlatoris Helder and C. solstitialis L. ssp. schouwii (DC.) Dostal were extracted by hydrodistillation and analysed by GC and GC-MS. Altogether 113 components were identified. Fatty acids and hydrocarbons were the most abundant components in the oils. Caryophyllene and caryophyllene oxide were the main compounds of the sesquiterpene fraction. The study on the biological activity of the oils shows no significant activity.
Volatile components of Centaurea eryngiodes Lam. and Centaurea iberica Trev.var. hermonis Bois. Lam.,two Asteraceae growing wild in Lebanon.
2005
The volatile components of the flowerheads of Centaurea eryngioides Lam. and Centaurea iberica Trev. var. hermonis Boiss. Lam. were obtained by hydrodistillation and identified by GC and GC–MS. Altogether 91 components, mostly fatty acids and hydrocarbons, were identified.
On the circumscription and taxonomic status of Centaurea caballeroi (Compositae)
2012
Se aportan datos sobre algunos táxones del grupo de Centaurea linifolia presentes en las sierras de la Comunidad Valenciana y áreas limítrofes. Como resultado se propone reconocer en C. antennata tres subespecies, con síndromes de caracteres propios, que ocupan áreas geográficas bien delimitadas y presentan un comportamiento ecológico diferenciado. Según esto, se propone la nueva combinación C. antennata subsp. caballeroi para las poblaciones del sur de Tarragona y norte de Castellón, seleccionándose además un lectótipo. Para cada taxon aceptado se indican sus caracteres morfológicos diferenciales, distribución y ecología. Además, se aporta una clave de identificación. Data are reported on …
Assessing the genetic diversity ofCentaurea parlatorisgroup (sect.Dissectae, Compositae) in Sicily using isozymes
2011
Abstract The Centaurea parlatoris group belongs to sect. Dissectae and is one of the most taxonomically critical groups in Sicily. The taxa included in it inhabit dry slopes, pastures and rocky places. Some of them are narrow endemics to Sicily, and others to Italy. The great morphological variability at the intrapopulation level has not permitted the creation of an adequate taxonomic scheme. The recent proposal of two new species from Sicily confirms the insufficient knowledge of the taxonomic diversity. This study involves eight Sicilian populations of the C. parlatoris group. Seven loci from nine enzyme systems [isocitrate dehydrogenase (IDH), malate dehydrogenase (MDH), 6-phosphoglucona…
Evaluation of genetic variability and relatedness among eight Centaurea species through CAAT-box derived polymorphism (CBDP) and start codon targeted…
2021
Centaurea is a value-ultimate genus of medicinal plants showing high diversification levels, especially within the Mediterranean basin, and is still traditionally recognized as a complicated taxon. So far, few studies utilizing molecular markers have been done on Centaurea spp. towards a better dissection of its phylogeny and accurate assessment of genetic diversity. Here, two functional marker systems, start codon targeted (SCoT) polymorphism and CAAT box-derived polymorphism (CBDP), were implemented to assess the genetic diversity between eight wild Centaurea species in Egypt. Seventeen SCoT and 19 CBDP primers generated 197 and 179 bands, respectively. These primers generated 158 (80.2%)…
A new species of Centaurea (Asteraceae) from Calabria(S Italy)
2013
A new species is described here from the Presila in Calabria (S Italy) and named Centaurea calabra. It belongs to Centaurea sect. Phalolepis and is related to the C. deusta group, namely to C. sarfattiana. Taxonomical characteristics, distribution, and ecology of the new Centaurea are also provided.
Centaurea heywoodiana (Asteraceae), a new species from the Nebrodi Mountains (NE-Sicily)
2020
A new endemic species of Centaurea is here described from the Nebrodi Mountains, in Sicily, and named Centaurea heywoodiana. Information on its morphology, distribution, ecology and taxonomic relationship is also provided.
Novedades y consideraciones sobre el género Centaurea L. en la flora valenciana
2008
Se realizan algunas reflexiones sobre las especies valencianotarraconenses de Centaurea sect. Willkommia, grupo que actualmente está conformado por seis táxones en dicho territorio. A partir del estudio de numeroso material que cubre la mitad norte de la provincia de Valencia y la totalidad de Castellón, se revisan dichos táxones y se realiza una nueva propuesta en la que se describen dos nuevas especies: C. aguilellae (de las comarcas del centro-norte de Valencia) y C. fabregatii (de las comarcas del centro-este de Castellón). Novelties and considerations on Centaurea L. concerning the Valencian flora (eastern Spain): Data are reported on the Valencian-Tarraconensian (E of Spain) species o…
Sesquiterpene lactones and lignans from Centaurea species
1992
Abstract The aerial parts of Centaurea calcitrapa yielded cnicin, cnicin 4′-acetate, melitensin, a related elemanolide, the two new germacranolides 11α,13- and 11β,13-dihydrosalonitenolide, and the lignans arctigenin, pinoresinol and 7′( S )-hydroxyarctigenin. The latter compound is described for the first time as a natural product. The aerial parts of Centaurea pabotii yielded 11,13-dihydrodeacylcynaropicrin, aguerin A and a new guaianolide related to cynaropicrin.