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Registros recuperados: 5
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Breeding system and related floral features under natural and experimental conditions of Passiflora suberosa (Passifloraceae) Boletín de la Sociedad
Amela García,María Teresa.
The breeding system, the floral characteristics and the visitors of the polymorphic Passiflora suberosa were studied in different natural populations of Corrientes and Misiones provinces, and at a partially-opened greenhouse in Buenos Aires. The different reproductive indexes calculated evidenced that, although it is highly self-compatible, autogamy is partial. The reproductive efficiency was similar in the field and in the greenhouse. The major relative reproductive success obtained by induced self-pollination suggests that the reproductive output may be improved with the help of pollinations, either natural or artificial. Although the single flower and the blooming are inconspicuous, the floral characters may be involved in wasps attraction. The scarcity...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Passiflora suberosa; Breeding system; Self-compatibility; Floral morphology.
Ano: 2008 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722008000100006
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Distyly and variation in floral traits in natural populations of Psychotria ipecacuanha (Brot.) Stokes (Rubiaceae) Rev. Bras. Bot.
Rossi,Ana Aparecida B.; Oliveira,Luiz Orlando de; Vieira,Milene F..
Psychotria ipecacuanha is a perennial, medicinal herb that grows in clusters in the understory of humid, shady areas of the Atlantic Rain Forest of southeastern Brazil. The present study characterized the variation in floral traits among 35 clusters from three natural populations of this plant species. Field observations showed that the clusters are isomorphic, that is, a given cluster will either set long-styled or short-styled flowers. Stigmas and anthers are reciprocally placed in each morph, a dimorphism characteristic of distyly. The populations are isoplethic, that is, a given population exhibits an equilibrium 1:1 ratio of floral morphs. Morphometric analyses revealed that anther length, stigma length, corolla diameter, and pollen grain diameter...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Distyly; Floral morphology; Ipecac; Medicinal plants; Psychotria ipecacuanha.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000200009
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Floral development in three species of Impatiens (Balsaminaceae) Naturalis
Caris, P.L.; Geuten, K.P.; Janssens, S.B.; Smets, E..
The floral morphological and developmental patterns in three species of Impatiens (Balsaminaceae), namely I. columbaria, I. hawkeri, and I. niamniamensis, were studied to contribute to a better understanding of floral evolution in the genus. Strangely enough, the highly diverse floral morphology and ontogeny of this horticulturally important genus have never been studied thoroughly (e.g., using scanning electron microscopic techniques). We discuss the position and the developmental sequence of the different perianth members. We hypothesized that in the course of evolution, the anterolateral sepals become reduced and that a morphocline can be recognized going from species with five sepals, over species with rudimentary sepals that fuse postgenitally with...
Tipo: Article / Letter to the editor Palavras-chave: Balsaminaceae; Ericales; Floral development; Floral evolution; Floral morphology; Impatiens; Scanning electron microscopy; 42.40.
Ano: 2006 URL: http://www.repository.naturalis.nl/record/422332
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Flower and floral trichome morphology of species of Dyckia Schult. f. (Bromeliaceae, Pitcairnioideae), and their importance to species characterization and genus taxonomy Acta Botanica
Carvalho,Jordano Dorval Tavares de; Essi,Liliana; Oliveira,João Marcelo Santos de.
ABSTRACT This paper presents a morphological analysis of the flower and floral trichomes of three rare species of Dyckia: Dyckia ibicuiensis, D. polyclada and D. racinae. Flowers at anthesis were collected from natural populations and subjected to morphometric and microscopic analysis. Among the most representative features for Dyckia are: morphometrics of individual floral parts; the general configuration of the androecium and gynoecium; the degree of fusion of the stigmatic lobes; the morphology of the ovules, especially in relation to the chalazal appendix; and the presence and constitution of peltate trichomes in the perianth, which exhibited a polymorphism not previously reported for Dyckia. The characters were effective at describing each species,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Androecium; Dyckia; Encholirium; Floral morphology; Gynoecium; Peltate trichome; Perianth; Pitcairnioideae.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100029
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Reproductive biology of Amasonia obovata Gleason (Laminaceae) Acta Amazonica
Schvinn,Thays de Assis; Miranda,Anderson Fernandes de; Silva,Celice Alexandre.
Floral mechanisms that ensure seed production via autogamy are more likely to occur in species growing in environments where pollination is scarce. Amasonia obovata was studied in the State of Mato Grosso-Brazil, from 2009 to 2012, to analyze the morphological and reproductive characteristics, aside from investigating the association of the reproductive success with the pollinator frequency and identity. The flowering and fruiting of A. obovata was concentrated in a period of five months during the rainy season. The dichogamy in flowers of A. obovata is not clearly defined, since the sexual functions were overlapped in the male and female phases. The species is self-compatible and not apomictic. The fruiting percentage obtained by hand self-pollination did...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Autogamy; Floral morphology; Flowering phenology; Hummingbird.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000400004
Registros recuperados: 5
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