Mayara Krasinski Caddah

Species boundaries inferred from microsatellite markers in the Kielmeyera coriacea complex (Calophyllaceae) and evidence of asymmetric hybridization

Kielmeyera coriacea is one of the most characteristic entities of the Cerrado, a savanna vegetation of Central Brazil and it is a morphologically highly variable polyploid species. In the revision of the genus, an earlier variety was elevated to a related species. However, this proposal has not been accepted by the scientific community and the problematic taxonomic circumscription of the group raises doubts about various scientific studies on plants identified as K. coriacea. In the present study, we investigated the subject by a population genetics approach using eight microsatellite markers in an attempt to understand better the relationships between the proposed species. Like morphological and anatomical observations, molecular studies of highly polymorphic markers showed a great similarity between K. coriacea and K. grandiflora. However, this tool could effectively screen the boundaries of the species complex and, in addition, detect an introgressive hybridization process.

Microsatellite markers isolated from polyploid Kielmeyera coriacea Mart. & Zucc. (Clusiaceae) from an enriched genomic library

Kielmeyera coriacea is a morphologically highly variable polyploid species, characteristic of the Cerrado, the savanna-like vegetation of the Central-Brazil. It was subject of various biological studies and, like others cerrado plants, this species suffers strong anthropogenic pressure. To access the genetic diversity of populations of this species, its taxonomic circumscriptions and to study supposed hybridization events, we have developed 11 polymorphic microsatellite loci from a CT/GT-enriched genomic library. The band pattern showed 12–32 bands per locus, and 2–8 bands per locus per individual. All microsatellites successfully amplified PCR products in K. grandiflora, the putative sister species, and all revealed similar multibanded pattern.

A New Species of Miconia (Melastomataceae) from the Atlantic Forest of Brazil

Abstract During the preparation of a monographic treatment for a group of Miconia from the Atlantic Forest, Brazil, a new species was detected and is presented here. Miconia ruschiana can be recognized among other species of Miconia sect. Glossocentrum by the terete branches, shortly plinerved leaves abaxially covered by non-lepidote stellate trichomes, panicles with glomerulate ending branches, large flowers with the calyx bearing long, caducous, external lobes, and ovaries that are densely covered by trichomes at the apex. The new species is known from the mountains of the state of Espírito Santo in eastearn Brazil.

Miconia atlantica, a new species of Melastomataceae from the eastern mountains of Brazil

A new species of Miconia from the mountains in the Atlantic Forest of eastern Brazil is presented here. Miconia atlantica has been collected in the states of São Paulo and Espírito Santo. It belongs to section Glossocentrum and can be recognized among others species in this section by the leaves with acute bases, an indumentum consisting of stellate trichomes moderately covering the abaxial surface of mature leaves, glomerulate inflorescences, and stamens with unappendaged connectives. Marsupiform domatia were found in São Paulo populations.

Novos registros para a família Melastomataceae nos Estados do Paraná e Santa Catarina, Brasil

ABSTRACT - (New records to the Melastomataceae family to Parana and Santa Catarina States, Brazil). The genus Henriettea DC. were recorded for the first time in Santa Catarina State, as well as four species of Melastomataceae: Henriettea glabra (Vell.) Penneys, Michelangeli, Judd & Almeda, Leandra tetraquetra (Cham.) Cogn., Miconia racemifera (DC.) Triana and Miconia paniculata (DC.) Naudin. Miconia paniculata and Salpinga margaritacea (Naudin) Triana are also recorded for the first time for Parana State, and the latter is confirmed for Santa Catarina State, since its occurrence was previosly recorded based in an old and flowerless collection. All these species have their distribution limits extended towards the south, reaching the Parana and Santa Catarina States. Descriptions, illustrations and taxonomic comments for all these new records are provided.Key words: Henriettea , Leandra , Miconia , Salpinga , taxonomyRESUMO - (Novos registros para a familia Melastomataceae nos Estados do Parana e Santa Catarina, Brasil). Neste trabalho sao registradas uma nova ocorrencia de genero