Distylous
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Risk of genetic vulnerability and aspects of the reproductive biology of Psychotria ipecacuanha (Rubiaceae), a threatened medicinal plant species of Brazilian forests
ABSTRACT Psychotria ipecacuanha, commonly known as Ipeca, is a medicinal plant of pharmacological and economic value. The species is distylous; it has populations with two floral morphs, one with long and one with short styles. Apart from the presence of two floral morphs in a balanced ratio (1:1), reciprocal herkogamy of the reproductive organs between alte
Acta Bot. Bras.. Publicado em: 12/09/2019
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2. Morpho-anatomical and morphometric studies of the floral structures of the distylous Oldenlandia salzmannii (Rubiaceae)
ABSTRACT The genus Oldenlandia (Rubiaceae) has a conflicting generic delimitation, with representatives that show different floral syndromes. Oldenlandia salzmannii is a marshy herb that is widespread in South America. It is heterostylous, specifically distylous, and self-compatible. Recent molecular phylogenetic studies found that this species forms a clade
Acta Bot. Bras.. Publicado em: 10/11/2016
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3. Fruit set of distylous Psychotria carthagenensis Jacq. (Rubiaceae) mediated by Apis mellifera (Apidae) and species of Augochloropsis (Halictidae)
Heterostyly is a floral polymorphism consisting in the presence of two morphs in the population that differ reciprocally in the position of their sexual organs. Heterostylous species depend on visitors to produce fruits, but the efficiency of insect species as pollinators greatly varies and depends on the morph visited. The aim of the present study was to de
Acta Bot. Bras.. Publicado em: 2015-06
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4. Biologia reprodutiva de Guettarda platypoda DC. (Rubiaceae) em uma área de restinga no Estado de Pernambuco
Distyly is a syndrome mainly found in the Rubiaceae family, being characterized by a floral dimorphism in which some individuals have thrum flowers (T) and others have pin ones (P). Typical distylous species present reciprocal hercogamy between floral morphs, a self and intramorph incompatibility mechanism and an equilibrated proportion of morphs in the popu
Publicado em: 2010
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5. Biologia reprodutiva de três espécies distílicas de Psychotria L. e efeitos da fragmentação florestal no sucesso reprodutivo e na diversidade genética de P. hastisepala Müll. Arg. (Rubiaceae) / Reproductive biology of three distylous species of Psychotria and effects of forest fragmentation in the reproductive success and the genetic structure on P. hastisepala Müll. Arg. (Rubiaceae)
The aims were to analyze the aspects of reproductive biology, including the reproductive success, of three Psychotria distylous species, P. conjugens, P. hastisepala and P. sessilis, in 2004/2005 and 2005/2006, in the largest forest fragment in the municipality of Viçosa (2045S and 42 54W), in the state of Minas Gerais, southeastern Brazil. Besides that, it
Publicado em: 2007
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6. VariaÃÃes florais e heterostilia em Palicourea rigida (Rubiaceae) nos cerrados do Brasil Central / Floral variations and heterostyly in Palicourea rigida H.B.K. (Rubiaceae) in the cerrados of Central Brazil
The distyly is a floral polymorphism controlled genetically, where the populations present individuals with pin flowers, that possess long styles and short stamens, and individuals with thrum flowers, that possess short styles and long stamens. Their populations tend to be isoplethyc and anomalies in the distribution of pin and thrum flowers in the populatio
Publicado em: 2007
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7. Morph-Specific Proteins in Pollen and Styles of Distylous Turnera (Turneraceae)
We used nondenaturing isoelectric focusing (IEF) in a survey of plants from 11 populations to identify style and pollen proteins unique to the short-styled morph of Turnera scabra, T. subulata and T. krapovickasii. Three protein bands [approximately isoelectric points (pIs) 6.1, 6.3 and 6.5] were found only in styles and stigmas of short-styled plants while