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| Registros recuperados: 11 | |
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| Virillo,Carolina Bernucci; Ramos,Flavio Nunes; Castro,Cibele Cardoso de; Semir,João. |
| (Floral biology and breeding system oi Psychotria tenuinervis Muell. Arg. (Rubiaceae) in the Atlantic rain forest, SE Brazil). The aim of this study was to investigate pollination biology, floral morphometry, morph ratio and breeding system oiPsychotria tenuinervis in an area of Atlantic rain forest in southeastern Brazil. Pollination biology was studied based on focal observations and the breeding system was determined using controlled crosses; data on flower production and floral morphometry were compared between the two floral morphs. Flower production by the two floral morphs was similar, with flowers being reciprocally herkogamous, diurnal and pollinated at similar frequencies, mainly by medium-sized bees. Corolla length and diameter, as well as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic forest; Distyly; Flower; Herkogamy; Pollination. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000400012 |
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| Demarco,Diego. |
| ABSTRACT Species of Apocynaceae stand out among angiosperms in having very complex flowers, especially those of asclepiads, which belong to the most derived subfamily (Asclepiadoideae). These flowers are known to represent the highest degree of floral synorganization of the eudicots, and are comparable only to orchids. This morphological complexity may also be understood by observing their glands. Asclepiads have several protective and nuptial secretory structures. Their highly specific and specialized pollination systems are associated with the great diversity of glands found in their flowers. This review gathers data regarding all types of floral glands described for asclepiads and adds three new types (glandular trichome, secretory idioblast and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomy; Apocynaceae; Asclepiadoideae; Diversity; Evolution; Flower; Secretory structures. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300477 |
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| Baumann,Thomas W.. |
| Human beings enjoy the flavor and stimulating activity of a cup of coffee without knowing that by doing so, they are part of a 'food web' and receive signals coffee plants build to improve their struggle for life. This review is centered in the first part on the purine alkaloid caffeine and its physiological role in the coffee plant's life cycle. Many of the thoughts and ideas presented here are plain speculation, because the real research revealing the secrets of plant physiology such as e.g. the formation of the coffee bean with all its ingredients, has just started. The recent achievements in molecular biology made it possible to tackle and answer new questions regarding the regulation of secondary metabolism in the coffee plant organs at selected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endosperm; Flower; Germination; Metabolite profiling; Purine alkaloid; Perisperm. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100017 |
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| MIGUEL,LAILA M.; SOBRADO,SANDRA V.; JANSSENS,STEVEN; DESSEIN,STEVEN; CABRAL,ELSA L.. |
| ABSTRACT Diacrodon is a monotypic genus of the tribe Spermacoceae (Rubiaceae), endemic to northeastern Brazil. Diacrodon compressus is frequently misidentified with a two lobed calyx species of Borreria, B. verticillata. Traditionally, in Spermacoceae the fruit type was considered a diagnostic character among the genera. In this sense, D. compressus presents a strongly compressed, one seeded and indehiscent fruit (vs. globose, two seeded and dehiscent fruit in B. verticillata). In this work, we address two objectives: evaluate the systematic position and determine the identity of Diacrodon in respect to other taxa. Molecular analyses using ITS and ETS indicate that D. compressus is strongly related to other species of Borreria. The morphological results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flower; Fruit; ITS-ETS dataset; Morphology; Pollen; Seed. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401397 |
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| Schnetzler,Bruna Noce; Teixeira,Simone Pádua; Marinho,and Cristina Ribeiro. |
| ABSTRACT This study aimed to obtain new information about the distribution, morphology and content of secretory trichomes present in the vegetative and reproductive organs of four species of Moraceae: Artocarpus heterophyllus, Dorstenia cayapia, Maclura tinctoria and Sorocea bonplandii. Stem, leaf, flower and inflorescence samples were processed for scanning electron and light microscopy. The species have secretory trichomes on the leaf blade, petiole and stem and also on the inflorescence and flowers of D. cayapia and S. bonplandii and on the peduncle of the inflorescence in A. heterophyllus. These trichomes are of the capitate type in all species, but A. heterophyllus also possess peltate secretory trichomes. Both trichome types exhibit a multicellular... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomy; Artocarpus; Dorstenia; Flower; Gland; Leaf; Maclura; Morphology; Sorocea. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300392 |
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| Registros recuperados: 11 | |
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