Cytotaxonomy of species of Vernonia, section Lepidaploa, group Axilliflorae (Asteraceae, Vernonieae)

dc.creatorDe Oliveira, VM
dc.creatorForni-Martins, ER
dc.creatorSemir, J
dc.date2007
dc.dateMAY
dc.date2014-11-18T18:20:47Z
dc.date2015-11-26T17:53:05Z
dc.date2014-11-18T18:20:47Z
dc.date2015-11-26T17:53:05Z
dc.date.accessioned2018-03-29T00:36:38Z
dc.date.available2018-03-29T00:36:38Z
dc.identifierBotanical Journal Of The Linnean Society. Blackwell Publishing, v. 154, n. 1, n. 99, n. 108, 2007.
dc.identifier0024-4074
dc.identifierWOS:000246577000009
dc.identifier10.1111/j.1095-8339.2007.00633.x
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/57620
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/57620
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/57620
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1290429
dc.descriptionMitotic chromosomes of eight populations of six species of Vernonia sensu Baker (Asteraceae, Vernonieae, section Lepidaploa, group Axilliflorae) were studied to assess the validity of maintaining the genus as proposed currently (sensu Baker) or of splitting it into several smaller genera (sensu Robinson). The species were collected in areas of 'cerrado' and 'campo rupestre' in southern and central-western Brazil. The chromosome numbers were 2n = 20-40 and karyotypic analysis showed a predominance of metacentric chromosomes, with some submetacentrics. B chromosomes were seen in one population of V. geminata. The chromosomes varied in length from 0.9 to 4.6 mu m, with a total chromatin length of 29.7-45.0 mu m and a symmetry index of 41.2-46.9%. The intrachromosomal asymmetry index varied from 0.13 to 0.29, and the interchromosomal asymmetry index varied from 0.15 to 0.21. The dispersion diagram showed that population 1 of V. geminata had the most asymmetrical karyotype. These results do not provide sufficient evidence for a conclusive cytotaxonomic discussion of Vernonia, mainly because of the impossibility of associating any infrageneric group with specific karyotypic characters, and also because of the small number of species analysed so far. (C) 2007 The Linnean Society of London.
dc.description154
dc.description1
dc.description99
dc.description108
dc.languageen
dc.publisherBlackwell Publishing
dc.publisherOxford
dc.publisherInglaterra
dc.relationBotanical Journal Of The Linnean Society
dc.relationBot. J. Linnean Soc.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectB chromosomes
dc.subjectchromosomes
dc.subjectkaryotype
dc.subjectmitosis
dc.subjectSouth-america Vernonieae
dc.subjectComplex Vernonieae
dc.subjectTaxonomic Revision
dc.subjectPollen Morphology
dc.subjectCompositae
dc.subjectGenera
dc.subjectGenus
dc.subjectCombinations
dc.subjectChromosomes
dc.subjectEvolution
dc.titleCytotaxonomy of species of Vernonia, section Lepidaploa, group Axilliflorae (Asteraceae, Vernonieae)
dc.typeArtículos de revistas


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