Agamospermy
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Biologia reprodutiva e polinizadores de Eupatorium intermedium DC. (Asteraceae) em fragmento de Floresta Atlântica / Reproductive biology and pollinators of Eupatorium intermedium DC. (Asteraceae) in an Atlantic Forest fragment
A Estação de Pesquisa, Treinamento e Educação Ambiental Mata do Paraíso (MP) é maior fragmento florestal (194 ha) de Viçosa (2045S e 4251W), Minas Gerais, Brasil. Sua vegetação é descrita como floresta estacional semidecidual e pertence aos domínios da Floresta Atlântica. Objetivou-se descrever a biologia reprodutiva de Eupatorium intermedium na
Publicado em: 2009
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2. Orchidaceae of the State Park of Serra de Caldas Novas, Goiás State, Brazil / Orchidaceae do Parque Estadual da Serra de Caldas Novas, Goiás, Brasil
(Orchidaceae of the State Park of Serra de Caldas Novas, Goiás State, Brazil). This study conducted a survey of the Orchidaceae species occurring at State Park of Serra de Caldas Novas (PESCAN) and a study of the floral biology and reproductive biology of Cyrtopodium eugenii Rchb. f. &Warm. and the effect of floral herbivory on reproductive success of this
Publicado em: 2009
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3. Guilda de flores de Ãleo do Parque Nacional do Catimbau: fenologia, polinizaÃÃo e sistema reprodutivo
The oil flowers are agrouped in nine families (Iridaceae and Orquidaceae â Monocots; Cucurbitaceae, Malpighiaceae, Plantaginaceae, Calceolariaceae, Solanaceae, Primulaceae and Krameriaceae â Eudicots), whose mais pollinators evolved independently inside two families ao Apoidea: Mellitidae and Apidae, whereas the bees of Centridini, Ctenoplectrini, Tapinota
Publicado em: 2008
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4. Biologia da polinização e reprodução de especies de Melastomataceae do Parque Nacional da Serra da Canastra (MG) / Pollination and reproductive biology of Melastomataceae from Serra da Canastra National Park (MG, Brazil)
This study examines the reproductive phenology, pollination ecology, and mating systems of 10 species of Melastomataceae that occur in the Serra da Canastra National Park, Minas Gerais. Seasonality exposes plants to periodic changes in quality and abundance of resources. Flowers of many species can be found throughout the year, but there are well-defined pea
Publicado em: 2008
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5. Embriologia de Miconia albicans (Sw.) Triana (Melastomataceae), especie agamospermica / Embriology of Miconia albicans (Sw.) (Melastomataceae), agamospermous species
Miconia albicans (Melastomataceae) is a species with diplosporic obligate agamospermy and no pollen viability in ?Cerrado? and Atlantic Forest vegetations. The sterility of pollen grains wasn?t restricted to one developmental stage and the major abnormality of the cells from pre-anthesis flower anthers was the deformation of the reproductive cell wall, mainl
Publicado em: 2007
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6. Biologia reprodutiva e germinação de sementes em Adenostemma brasilianum (Pers.) Cass. (Asteraceae) / Reproductive biology and seed germination of Adenostemma brasilianum. (Pers.) Cass. (Asteraceae)
Specific studies on the reproductive biology and seed germination of Adenostemma brasilianum are inexistent. Aiming to fill this gap, the objective of this study was to investigate its life history (reproductive phenology and fruit dispersion process), reproductive biology, including tests on the efficiency of two types of materials in isolating the heads fr
Publicado em: 2007
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7. Biologia reprodutiva e hibridação em especies sintopicas de Ludwigia (Onagraceae) no sudeste do Brasil
The family Onagraceae Juss. is considered a natural family and particularly interesting to study breeding systems because its moderate size and relatively abundant morphological, systematic, molecular and chemical information. Ludwigia L. is a distinct genus in the family, the only member of the tribe Jussiaeeae, comprises more than 80 species distributed ma
Publicado em: 2002
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8. Estudos sobre a biologia reprodutiva de especies de melastomataceae de cerrado em Itirapina, SP
This study was set up to investigate some aspects of the reproductive biology of 11 species of Melastomataceae growing in cerrado vegetation, in Itirapina, SP, Brazil. These were: Leandra lacunosa Cogn., Miconia albicans (Sw.) Triana, M. fallax DC., M. langsdorffii Cogn., M. ligustroides (DC.) Naud., M. minutiflora (Bonpl.) DC., M. pepericarpa Mart. ex DC.,
Publicado em: 1994
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9. Distribution of spontaneous plant hybrids.
Natural hybridization is a relatively common feature of vascular plant species and has been demonstrated to have played an important role in their evolution. Nonetheless, it is not clear whether spontaneous hybridization occurs as a general feature of all plant families and genera or whether certain groups are especially prone to spontaneous hybridization. T