Navegando por Autor "Martins, Márcio Lacerda Lopes"
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Item Cyperaceae do Parque Estadual Paulo César Vinha, Guarapari, Espírito Santo, Brasil(Acta Botanica Brasilica, 1999-05) Martins, Márcio Lacerda Lopes; Carvalho- Okano, Rita Maria de; Luceno, ModestoEste trabalho consiste no levantamento dos representantes de Cyperaceae da restinga do Parque Estadual Paulo César Vinha, Guarapari, Brasil. A família está representada no local por 38 espécies. São apresentadas descrições, ilustrações, chaves de identificação e comentários para todos os táxons.Item Evolutionary history of Manihot carthagenensis (Euphorbiaceae) and allied species in eastern South America(Molecular Phylogenetics and Evolution, 2019-03) Silveira, Thamyres Cardoso da; Martins, Márcio Lacerda Lopes; Rody, Hugo Vianna Silvapt-BR; Oliveira, Luiz Orlando deIntermittent episodes of climate changes, such as those that occurred during the Pleistocene, likely shaped the diversification of the young genus Manihot Mill. (Euphorbiacheae). One of such recently-derived congeners ─ M. carthagenensis ─ exhibits a widely disjunct distribution across dry environments in Eastern South America. Herein, we used molecular data from four nuclear gene regions (sts, ch_metE, g3pdh, and nia-i3) and seven nuclear microsatellite loci for reconstructing the phylogenetic relationships among M. carthagenensis and allied species and exploring likely phylogeographic scenarios that shaped the diversification and the distribution of gene pools of M. carthagenensis across the Caatinga and Chaco. Our data suggest that M. carthagenensis is not a monophyletic clade, as presently circumscribed. Morphological differences, genealogical relationships, and vegetation associations support three well-differentiated lineages, each of which merits the species rank: M. carthagenensis, M. glaziovii, and M. hahnii. Microsatellite data suggest that the newly circumscribed M. carthagenensis consists of at least three distinct gene pools, which are partly structured according to geography. The three gene pools likely evolved in allopatry, but remained interfertile. Population expansions after climate amelioration contributed to structuring hybrid zones. Moreover, we described two new single-copy gene regions (sts and ch_metE) as sources of molecular variation; they can facilitate the fine-scale probing of other parts of the phylogeny across Manihot.