44 research outputs found
Flores ornitĂłfilas odorĂferas: duas espĂ©cies de Palicourea (Rubiaceae)na Estação BiolĂłgica de Santa LĂșcia, ES, Brasil
Genotypic profile of Listeria monocytogenes isolated in refrigerated chickens in southern Rio Grande do Sul, Brazil
Borboletas frugĂvoras (Lepidoptera: Nymphalidae) de uma ĂĄrea urbana (Ărea de Proteção Especial Manancial Cercadinho) em Belo Horizonte, Minas Gerais, Brasil
An overview of Listeria monocytogenes contamination in ready to eat meat, dairy and fishery foods
Fauna of mosquitoes (Diptera: Culicidae) in Goytacazes National Forest and surrounding area, State of EspĂrito Santo, Southeastern Brazil
Morphological characterization of pollens from three Apiaceae species and their ingestion by twelve-spotted lady beetle (Coleoptera: Coccinellidae)
Genes de virulĂȘncia e diversidade genĂ©tica em Salmonella spp. isoladas de amostras de origem suĂna
Composição quĂmica e toxicidade de Ăłleos essenciais para o pulgĂŁo-verde Schizaphis graminum (Rondani, 1852)
Pollination of Pagamea duckei Standl. (Rubiaceae): a functionally dioecious species
The floral biology, pollination and breeding system of Pagamea duckei Standl. (Rubiaceae) were studied at the Reserva BiolĂłgica da Campina, Manaus, Amazonas, Brazil. Floral morphology suggested that P. duckei is a distylous species. However, crossing experiments revealed that it is functionally dioecious. The flowers are actinomorphic, yellowish, produce nectar and a sweet odor, which is more intense in the morning. Anthesis started in the morning between 5.00 and 6.00 AM and extended until dusk, when the corolla tube abscissed. The flowers were visited mostly by bees of the genus Melipona. Pagamea duckei is not agamospermic and thus needs pollen vectors for effective pollination. The results of this study strengthen the idea that, in Pagamea, species with distylous flower morphology are actually functionally dioecious