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| Registros recuperados: 10 | |
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| Souza,Margarete Magalhães; Viana,Alexandre Pio; Pereira,Telma Nair Santana. |
| Yellow passion fruit (Passiflora edulis f. flavicarpa) is a self-incompatible crop with purple corona flowers (PCF). Plants exhibiting white corona flowers (WCF) were observed in an experimental field located in Campos dos Goytacazes - RJ, Brazil. This study was performed in order to test the fertility of these genotypes through studies of in vivo pollination, meiotic behavior and pollen viability. Using in vivo pollination, the mean fruit set percentage, obtained from self-pollinations at the moment that flowers open, was 70.83% in WCF and 0% in PCF. In terms of cytological analysis, for both kinds of plants, WCF and PCF, the meiotic behavior was considered regular, considering the high meiotic index estimated for both of them, 96.3% and 97.7%, and pollen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passion flower; Self-compatibility; In vivo pollination; Meiotic behavior; Pollen viability. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000100003 |
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| Santos,Eileen Azevedo; Souza,Margarete Magalhães; Viana,Alexandre Pio; Almeida,Alex-Alan Furtado de; Araújo,Ioná Santos; Freitas,Jôsie Cloviane de Oliveira. |
| Ornamental hybrids of passion flowers are thoroughly diffused in many countries and used in the decoration of houses and gardens. However, the cultivation of ornamental passion fruits practically unexploited in Brazil. This study aimed at evaluating the growth and blooming of F1 hybrids of Passiflora L. (P. sublanceolata J.M. MacDougal [ex P. palmeri var. sublanceolata Killip] vs. P. foetida var. foetida L.) cultivated in ceramic and concrete pots under different shading levels. The vegetative and flower evaluations were carried out weekly, in clonal cuttings 60 days after rooting. The height, leaf length and width, the number of internodes and leaves and stem diameter were evaluated using a randomized complete design in a factorial scheme which... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passion flower; Ornamental hybrids; Interspecific hybridizations; Light intensity; Morphological characteristics. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000200007 |
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| Cruz,Thyane Viana; Souza,Margarete Magalhães; Roza,Francisvaldo Amaral; Viana,Américo José Carvalho; Belo,Gabriela de Oliveira; Fonseca,Josefa Wilma dos Santos. |
| Com o objetivo de avaliar a performance polínica de Passiflora suberosa, realizou-se a análise de germinação in vitro em grãos de pólen de plantas mantidas em casa de vegetação nas condições de Ilhéus, sul da Bahia, coletados em diferentes horários após a antese. A análise estatística foi realizada no delineamento inteiramente ao acaso, com seis tratamentos que consistiram de horários de coleta, de 7 às 17 h. O meio de germinação foi o recomendado para o maracujazeiro-amarelo, e as lâminas foram incubadas a 28°C (+ 1°C). Houve diferença significativa (P<0.01) entre os seis horários testados. O percentual médio de germinação do pólen foi negativamente influenciado pelo número de horas após a antese. Os maiores índices de germinação foram obtidos no... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passifloraceae; Maracujazinho-cortiça-preto; Pólen; Performance polínica; Planta ornamental. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000400006 |
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| Conceição,Léo Duc Haa Carson Schwartzhaupt da; Souza,Margarete Magalhães; Belo,Gabriela de Oliveira; Santos,Sheila Félix dos; Freitas,Jôsie Cloviane Oliveira de. |
| (Hybridization among wild passionflower species). Passion fruits are appreciated for their ornamental value, since their flowers are showy and display a wide variety of colors. In addition, many hybrids have been produced and used in other countries. The genotypes used in selection of plants with ornamental characteristics are hybrid progenies which are used in various crossing strategies. Thus, the aim of this work was to obtain interspecific hybrids, perform backcrossing and obtain progenies from crossings between hybrids, and to determine the reproductive compatibility between the progenitors involved. The percentage of fertilized flowers, germination, and the number of fruits, seeds and plants obtained through crossing were recorded. A series of 374... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Interspecific crossing; Ornamental plants; Passiflora; Seed germination. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000200011 |
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| Godoy,Paula Roberta Esteves de; Souza,Margarete Magalhães; Roza,Francisvaldo Amaral; Lawinscky,Pabliane Ramos; Araújo,Ioná Santos; Ahnert,Dário. |
| A importância econômica do cacaueiro se deve, principalmente, à produção de frutos, dos quais se extraem sementes que servem como matéria prima para a fabricação do chocolate. Vários fatores podem interferir na produção, porém as características reprodutivas do cacaueiro e sua influência na frutificação não têm sido intensamente estudadas. Além disso, alguns genótipos são autoincompatíveis, mas clones autocompatíveis são encontrados em populações comerciais. Com o objetivo de comparar a performance do pólen e o modo de reprodução entre clones autocompatíveis CCN51 e autoincompatíveis TSH1188, foram realizadas estudos de germinação in vitro (utilizando-se dois testes) e da razão pólen-óvulo (P:O). O Teste 1 (meio de cultura sem alguns elementos essenciais e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cacau; Germinação in vitro; Óvulo; Pólen. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000300019 |
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| Souza,Margarete Magalhães; Martins,Ernane Ronie; Pereira,Telma Nair Santana; Oliveira,Luiz Orlando de. |
| The aim of this work was to carry out the reproductive studies on Brazilian accessions of ipecac, Psychotria ipecacuanha. It presented heterostyly, with brevistylous and longistylous flowers. The pollen development was observed from the sections of the anthers embedded in resin. Anther development was normal as usually observed in dicotyledones, displaying four layers: outer epidermis, endothecium, middle layer and inner tapetum. The pollen was bicellular and filled with starch at the microspore stage. Pollen morphology was studied using SEM, which showed pollen polymorphism within and between the two floral morphs. Five types of pollen with reticulate or perforate exine were identified. The characteristics showed that the sexual process was as important... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ipecac; Heterostyly; Anther anatomy; Microsporogenesis; Exine. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500015 |
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| Amorim,Juliane dos Santos; Souza,Margarete Magalhães; Viana,Américo José Carvalho; Freitas,Jôsie Cloviane de Oliveira. |
| This study aimed to characterize the reproductive system of Passiflora capsularis L. and P. rubra L. In vivo controlled pollinations, in vitro pollen germination and pollen-ovule (P:O) ratio evaluation were conducted. In self-pollination, intraspecific and interspecific pollination, P. capsularis showed means of 62.5, 68.7 and 48.4% of fertilized flowers, while in P. rubra, the averages were 67.2, 62.5 and 46.9%, respectively. For in vitro germination, 52.2% of P. capsularis pollen grains germinated while in P. rubra, the percentage was 64.4. The P:O ratio was 22.4 for P. capsularis, and 27.4 for P. rubra, which included them in the category of obligatory autogamous. Passiflora capsularis and P. rubra can reproduce both by self-pollination and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: In vivo pollination; In vitro germination; Passion flower; Pollen-ovule ratio. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000400007 |
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| Registros recuperados: 10 | |
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