Cytological study of Aegiphila sellowiana, Vitex montevidensis and Citharexylum myrianthum from Tibagi River Basin, Paraná, Brazil
Keywords:
chromosomes, number, size, interphase nuclei.Abstract
Lamiaceae and Verbenaceae are the main families in order Lamiales distributed in all tropical and temperate regions of the world. In this study, cytological comparisons were made between Aegiphila sellowiana Chamisso, Vitex montevidensis Chamisso and Citharexylum myrianthum Chamisso, collected in different areas of Tibagi River Basin, of Paraná State, Brazil. Results showed that A. sellowiana presents 2n = 42 chromosomes, larger than those of V. montevidensis (2n = 34) and of C. myrianthum (2n = ca.104), which presents the smallest. The three analyzed species presented interphase nuclei of an arreticulate to semi-reticulate type and a proximal pattern of prophase condensation, without intraspecifi c variation or interspecifi c differences. Our results indicate that, from a cytological point of view (based on their chromosome numbers and size), individuals of these three species can be correctly identifi ed and their seeds safely used for environmental restoration programs in the Tibagi River Basin.
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References
APG II ANGIOSPERM PHYLOGENY GROUP. 2003. An ordinal classifi cation for the families of fl owering plants. Botanical Journal of the Linnean Society, v.141, p.399-436.
BRANDÃO, A. D.; VICCINI, L. F.; SALIMENA, F. R. G.; VANZELA, A. L. L.; RECCO-PIMENTEL, S. M. 2007. Cytogenetic characterization of Lippia alba and Lantana camara (Verbenaceae) from Brazil. Journal of Plant Research, v.120, p.317-321.
CANTINO, P. D. 1992. Evidence for a polyphyletic origin of the Labiatae. Annals of the Missouri Botanical Garden, v.79, n.2, p.361-379.
CARR, G. D. 1978. Chromosome Numbers of Hawaiian Flowering Plants and the Signifi cance of Cytology in Selected Taxa. American Journal of Botany, v.65, n.2, p.236-242.
DIJKGRAAF, A. C.; LEWIS, G. D.; MITCHELL, N. D. 1995. Chromosome number of the New Zealand puriri, Vitex lucens Kirk. New Zealand Journal of Botany, v.33, p.425-426.
GUERRA, M. 1986. Reviewing the chromosome nomenclature of Levan et al. Revista Brasileira de Genética, v.9, n.4, p.741-743.
______. 2008. Chromosome numbers in plant cytotaxonomy: concepts and implications. Cytogenetic and Genome Research, v.120, n.3-4, p.339-350.
INDEX TO PLANT CHROMOSOME NUMBERS (IPCN). Missouri Botanical Garden. Disponível em: <http://mobot.mobot.org/W3T/Search/ipcn.html>. Acesso em: 24 de abril 2009.
LEVIN, D. 2002. The role of chromosomal change in plant evolution. Oxford: Oxford University Press. 244p.
MASTERSON, J. 1994. Stomatal size in fossil plants: evidence for polyploidy in majority of angiosperms. Science, v.264, n.5157, p. 421-424.
MOLDENKE, H. N.; MOLDENKE, A. L. 1983. Verbenaceae. In: DASSANAYAKE, M. D.; FOSBERG, F.R. (Ed.) A revised handbook to the fl ora of Ceylon. New Delhi: Amerind Publishing. v. 4, p.196-487.
MOLERO, J.; DAVINA, J. R.; HONFI, A. L.; FRANCO, D.; ROVIRA, A. 2006. Chromosome studies on plants from Paraguay II. Candollea, v.61, n.2, p.373-392.
ÖZDEMIR, C.; SENEL, G. 1999. The morphological, anatomical and karyological properties of Salvia sclarea L. Turkish Journal of Botany, v.23, p.7-18.
PEDROSA, A., GITAÍ, J.; SILVA, A. E. B.; FELIX, L. P.; GUERRA, M. 1999. Citogenética de angiospermas coletadas em Pernambuco V. Acta Botanica Brasílica, v.13, n.1,p.49-60.
SANDERS, R. W. 1987. Taxonomic signifi cance of chromosome observations in Caribbean species of Lantana (Verbenaceae). American Journal of Botany, v.74, n.6, p.914-920.
SANDERS, R. W. 2001. The genera of Verbenaceae in the southeastern United States. Harvard Papers in Botany, v.5, n.2, p.303-358.
SUN, B. Y.; STUESSY, T. F.; CRAWFORD, D. J. 1990. Chromosome Counts from the Flora of the Juan Fernandez Islands, Chile. III. Pacifi c Science, v.44, n.3, p.258-264.
VICCINI, L. F.; PIERRE, P. M. O.; PRAÇA, M. M.; COSTA, D. C. S.; SOUSA, S. M.; PEIXOTO, P. H. P.; SALIMENA, F. R. G. 2005.
Chromosome numbers in the genus Lippia (Verbenaceae). Plant Systematics and Evolution, v.256, p.1-4.
