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	Provedor de dados Acta Botanica (2) Autor Azevedo,Aristéa Alves (1) Dalvi,Valdnéa Casagrande (1) Gonçalves-Esteves,Vania (1) Meira,Renata Maria Strozi Alves (1) Mendonça,Cláudia Barbieri Ferreira (1) Sousa,Hian Carlos Ferreira de (1) Mais... Palavra-chave Coutoubeinae (2) Chironiinae (1) Helieae (1) Morphology (1) Palynology (1) Pollen grains (1) Potalieae (1) Saccifolieae (1) Secretory structures (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2017 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Are stem nectaries common in Gentianaceae Juss.? Acta Botanica Dalvi,Valdnéa Casagrande; Meira,Renata Maria Strozi Alves; Azevedo,Aristéa Alves. ABSTRACT Extrafloral nectaries (EFNs) are specialized structures that produce and release nectar and are located on leaves, cotyledons and, more seldomly, stems. Peculiar leaf nectaries have been described for thirty-three Neotropical species of Gentianaceae, while stem nectaries have been reported for only nine. The aim of this study was to verify the occurrence of stem EFNs within Gentianaceae and investigate the existence of a correlation between their occurrence and the geographical distribution of species. Samples of internodal regions from field and herbarium specimens were submitted to standard light microscopy techniques. Data regarding the geographical distribution of species were acquired from herbarium specimens and the literature. A total of 37... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coutoubeinae; Helieae; Potalieae; Saccifolieae; Secretory structures. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300403 Pollen diversity in selected species of the tribe Chironieae (Gentianaceae Juss.) that occur in the Atlantic Forest, Brazil Acta Botanica Sousa,Hian Carlos Ferreira de; Gonçalves-Esteves,Vania; Mendonça,Cláudia Barbieri Ferreira. ABSTRACT Based on molecular data, the tribe Chironieae (Gentianaceae) is divided into three subtribes. This study aims to describe the pollen morphology of representatives of two of the three subtribes that occur in the Atlantic Forest in order to contribute to a better understanding of the palynology of these taxa and to clarify the taxonomy of the family: subtribe Chironiinae (Centaurium erythraea and Zygostigma australe) and subtribe Coutoubeinae (Coutoubea ramosa, C. spicata, Deianira chiquitiana, D. damazioi, D. erubescens, D. nervosa and D. pallescens). Botanical material was obtained from exsicates and treated by acetolysis for light microscopy. Pollen grains were measured and photomicrographed, and the results statistically analyzed. For SEM study,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chironiinae; Coutoubeinae; Morphology; Palynology; Pollen grains. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100120 Registros recuperados: 2 Primeira ... 1 ... Última

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