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Registros recuperados: 3
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Biosystematic and chemosystematic studies in five South American species of Conyza (Asteraceae) Boletín de la Sociedad
Urdampilleta,Juan D.; Amat,Aníbal G.; Bidau,Claudio J.; Kolb Koslobsky,Nicolás.
The composition of the essentials oils of five species of Conyza Less from Argentina was determined by Gas Chromatography-Mass Spectrometer. This composition is associated to morphological and cytogenetic characters. The monoterpenes constitute more than 60% of the essential oils in C. blakei, C glandulitecta, C. sumatrensis var. sumatrensis and C. sumatrensis var. floribunda, in which limonene is the predominant compound. In C. bonariensis and C. primulaefolia the monoterpene content constitute less than the 40%. C. bonariensis presents only 13% limonene, while in C. primulaefolia it is absent. The similarity analysis of monoterpenes showed a relationship between the morphological and cytogenetic analysis, and the monoterpene content character seems to be...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Essential oils; Chemosystematics; Morphology; Cytogenetics; Conyza; Asteraceae.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722005000100011
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Karyotypic studies and morphological analysis of some reproductive features in five species of Conyza (Astereae: Asteraceae) from Northeastern Argentina Boletín de la Sociedad
Urdampilleta,Juan D.; Amat,Aníbal G.; Bidau,Claudio J..
The cosmopolitan genus Conyza Less. comprises about 100 species, 22 of which occur in Argentina. Current taxonomic treatments, largely based on exomorphological characters, are insufficient to characterize and circumscribe some of their polymorphic species. Interspecific variations in inflorescences typology and capitula structure, as well as karyotypic aspects, were studied in five species of Conyza that naturally occur in Misiones Province (Argentina): C. blakei (Cabrera) Cabrera, C. bonariensis (L.) Cronquist var. bonariensis, C. glandulitecta Cabrera, C. primulaefolia (Lam.) Cuatrec. & Lourteig, C. sumatrensis (Retz.) E. Walker var. sumatrensis and C. sumatrensis (Retz.) E. Walker var. floribunda (Kunth) J. B. Marshall. Chromosome numbers for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Asteraceae; Astereae; Chromosomes; Conyza; Inflorescence; Interspecific variation; Karyotype.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722005000100010
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Toulicia crassifolia (Sapindaceae, Sapindeae): Caracteres carpológicos, seminales, distribución y citogenética Boletín de la Sociedad
Ferrucci,María S.; Urdampilleta,Juan D..
Se completa la diagnosis original de Toulicia crassifolia Radlk. (Sapindaceae, Sapindeae) mediante la descripción del fruto y la semilla, hasta ahora desconocidos; el lectotipo es aquí designado. Esta especie conocida para Minas Gerais y Pernambuco, es ahora registrada para Bahia, Goiás y Tocantins. Nuestro recuento de 2n = 28, constituye el primer registro para el género; la fórmula cariotípica es 4m + 14sm + 10st, ésta muestra una relativa asimetría (TF % = 15,9).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sapindaceae; Toulicia crassifolia; Morfología; Distribución; Citogenética.
Ano: 2009 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722009000200014
Registros recuperados: 3
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