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	Provedor de dados Boletín de la Sociedad (1) Darwiniana (1) Autor Barboza,Gloria E. (1) Chiarini,Franco E (1) Chiarini,Franco E. (1) Gauthier,Martha J (1) Palavra-chave Leptostemonum (2) Andromonoecy (1) Chromosome stasis (1) Heterochromatin (1) Placentation (1) Ribosomal DNA (1) Seed number (1) Solanum (1) Solanum subgen (1) South America (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2016 (1) 2007 (1) País Argentina (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Placentation patterns and seed number in fruits of South American Solanum subgen. Leptostemonum (Solanaceae) species Darwiniana Chiarini,Franco E.; Barboza,Gloria E.. Thirty-seven South American species representing seven sections of Solanum subgen. Leptostemonum were analyzed. Andromonoecious as well as hermaphrodite species were considered. The length and width of their fruits was measured, and the number of seeds per fruit was counted. Medial cross sections of fresh, ripe fruits were observed with a stereoscopic microscope and illustrated. Six placentation patterns and three types of seeds were described. A relationship among seed number, fruit size, fruit color and sexual system was detected by means of statistical analysis. These results suggest that andromonoecy affects fruit size and placentation patterns, in order to contain a higher number of seeds per fruit. Tipo: Info:eu-repo/semantics/article Palavras-chave: Andromonoecy; Leptostemonum; Placentation; Seed number; Solanum; South America. Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932007000200002 Chromosome differentiation in three species of Leptostemonum (Solanum, Solanaceae) endemic to oceanic islands Boletín de la Sociedad Chiarini,Franco E; Gauthier,Martha J. The chromosomes of Solanum nelsonii, S. sandwicense (endemic to the Hawaii islands) and S. vespertilio (from the Canary islands) were studied by means of classical staining, CMA/DAPI banding and FISH with probes for the 18-5.8-26S and 5S rDNA genes. The aim of this study was to test for chromosomal changes (chromosome number, karyotype, heterochromatin pattern, rDNA loci) during the evolution of these taxa with respect to their continental relatives. An apparent chromosome stasis was confirmed in all three species, in regards to chromosome number and karyotype morphology. However, there was also evidence of cryptic, cumulative sequence changes. Speciation in these species is not likely associated with large, obvious chromosome rearrangements or polyploidy,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome stasis; Heterochromatin; Ribosomal DNA; Solanum subgen; Leptostemonum. Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722016000200009 Registros recuperados: 2 Primeira ... 1 ... Última

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