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| Registros recuperados: 14 | |
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| Rodrigues,Luiz Antonio da Costa; Agostini,Kamila da Matta; Alencar,Alexandre Santos de; Mendonça,Cláudia Barbieri Ferreira; Carvalho,Marcelo Araújo de; Gonçalves-Esteves,Vania. |
| ABSTRACT The procedures for a set of techniques to recover grains of pollen 26 and spores from liquid samples are described. Liquefied samples of matrices, such as melting lakes, snow and ice, can provide a record of climatic and environmental events at different geographic and temporal scales. The need for standardization of techniques was demonstrated in research carried out with matrices of snow and water of thawing lakes and snow collected on King George and Joinville islands (Antarctica). The use of the methods described can permit increased rescue of palynomorphs from liquid matrices, thereby adding greater reliability to palynological data and its use as a biotracer of environmental events. Methods of sieving and centrifugation were tested, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antarctica; Ice; Spores; Snow; Technique to recover grains of pollen. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400667 |
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| Fourny,Ana Carolina da Silva; Mendonça,Cláudia Barbieri Ferreira; Lopes,Thereza Cristina Costa; Gonçalves-Esteves,Vania. |
| Foi realizado um estudo palinológico de 21 espécies da família Gesneriaceae reunidas em seis gêneros e três tribos: tribo Beslerieae -Besleria L. (4 spp.); tribo Episcieae - Codonanthe (Mart.) Hanst. (3 spp.), Nematanthus Schrad. (5 spp); tribo Sinningieae -Paliavana Vand. (1 sp.), Sinningia Nees (6 spp.) e Vanhouttea Lem. (2 spp.) ocorrentes no Estado do Rio de Janeiro, Brasil. Objetivou-se caracterizar e ampliar os dados morfológicos da família, em nível genérico ou específico, contribuindo assim, para uma delimitação mais precisa dos táxons. Os grãos de pólen foram acetolisados, medidos, descritos e ilustrados sob microscopia de luz. Para observar detalhes da superfície e abertura, grãos de pólen não acetolisados foram analisados em microscópio... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Palinotaxonomia; Pólen; Lamiales; Floresta Atlântica. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000300024 |
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| Souza,Mariana Albuquerque de; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| Foram estudadas oito espécies de Nyctaginaceae Juss., com o objetivo de caracterizá-las palinologicamente e, assim, contribuir para a elaboração de um catálogo polínico da flora das restingas do Estado do Rio de Janeiro. As espécies examinadas foram Boerhavia diffusa L., Bougainvillea glabra Choisy, B. spectabilis Willd., Guapira obtusata (Jacq.) Little, G. opposita (Vell.) Reitz, G. pernambucencis (Casar.) Lund., Leucaster caniflorus (Mart.) Choisy e Mirabilis jalapa L. Os grãos de pólen foram acetolisados, mensurados, descritos e fotomicrografados. A análise de microscopia eletrônica de varredura foi utilizada em grãos de pólen não acetolisados, para confirmar as descrições feitas sob microscopia de luz e, em alguns casos para confirmar as descrições de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Palinologia; Nyctaginaceae; Rio de Janeiro; Restinga. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000100011 |
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| Moreira,Fábio de França; Mendonça,Cláudia Barbieri Ferreira; Pereira,Jorge Fontella; Gonçalves-Esteves,Vania. |
| Neste trabalho foram tratadas, palinologicamente, 11 espécies de Apocynaceae pertencentes a sete gêneros, ocorrentes na restinga de Carapebus, situada no litoral norte do Estado do Rio de Janeiro. As espécies tratadas foram: Aspidosperma parvifolium A. DC.; Forsteronia leptocarpa (Hook. & Arns.) A. DC.; Himatanthus lancifolius (Müll. Arg.) Woodson; Mandevilla fragrans (Stadelm.) Woodson; Mandevilla sp.; M. moricandiana (A. DC.) Woodson; M. tenuifolia (J.C. Mikan) Woodson; Prestonia coalita (Vell.) Woodson; Rhabdadenia pohlii Müll. Arg.; Tabernaemontana flavicans Willd. ex Roem. & Schult.; T. laeta Mart. Os grãos de pólen foram tratados pelo método da acetólise láctica, medidos, descritos e ilustrados sob microscopia de luz e microscopia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Palinologia; Apocynaceae; Restinga de Carapebus; Rio de Janeiro. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062004000400002 |
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| Mendonça,Cláudia Barbieri Ferreira; Esteves,Roberto Lourenço; Gonçalves-Esteves,Vania. |
| Foi realizado o estudo polínico de 23 espécies de Lepidaploa (Cass.) Cass. (Vernoniinae-Compositae) ocorrentes no Sudeste do Brasil, com o objetivo de contribuir para a caracterização polínica dessas espécies, bem como avaliar sua posição taxonômica. Os grãos de pólen foram acetolisados, medidos, descritos e ilustrados sob microscópia de luz. Para observar detalhes da superfície e da abertura, grãos de pólen não acetolizados foram analisados em microscópio eletrônico de varredura (MEV) e, em seguida, eletromicrografados. Foram estudadas as características dos grãos de pólen como forma, tamanho, constituição da exina e abertura. As espécies analisadas nesse estudo possuem grãos de pólen de tamanho médios ou grandes, isopolares, suboblatos,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compositae; Lepidaploa; Palinologia; Sudeste brasileiro; Vernoniinae. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000100008 |
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| Magenta,Mara Angelina Galvão; Nunes,Alessandra De Deus; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vânia. |
| With the aim of improving inter-specific delimitation of the genus Viguiera Kunth in Brazil, a palynological analysis was undertaken with 27 taxa, representing around 77% of all occurring species. Samples were obtained from herbarium specimens and the pollen grains were analyzed through light and scanning electron microscopy. Characteristics, including the shape of the pollen grains, polar and equatorial diameter, aperture measurements, surface ornamentation and exine thickness, were registered and compared. The pollen grains were medium-sized (25 - 50 mm), isopolar and oblate spheroidal (prolate spheroidal in V. aspilioides Baker). The observed values corroborated the synonymity of some species and also highlighted certain micro-morphological differences,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asteraceae; Brazil; Compositae; Pollen; Taxonomy; Viguiera. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722010000200008 |
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| 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 |
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| Moreira,Giselle Lopes; Cavalcanti,Taciana Barbosa; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vânia. |
| Abstract There are nine species of the plant genus Verbesina in Brazil, which are distributed in the Northeast, Center-West, Southeast and South regions of the country. The objective of the present study was to describe the pollinic morphology of eight of these species to better characterize them and evaluate potential species-level taxonomic characters. Acetolysed pollen material was measured within seven days under light microscopy, while non-acetolyzsed pollen grains were used for scanning electronic microscopy. The pollen grains were found to be oblate-spheroidal, medium-sized, isopolar, monads that are 3-colporate with a subtriangular amb, a small polar area, a long colpus, a lalongate endoaperture, a caveate exine and an echinate sexine. Although the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Compositae; Heliantheae; Morphology; Pollen; Verbesina. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100128 |
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| Mezzonato-Pires,Ana Carolina; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| Pollen grains from twelve species of the Passifloraceae family from the Brazilian Atlantic Forest were analyzed: Passiflora subg. Astrophea (1sp.), P.subg. Decaloba (1sp.) and P.subg. Passiflora (10spp.). The current study aims to acquire additional information and feature the pollen morphology of the herein studied species to help setting a more precise taxa delimitation. Acetolyzed pollen grains were measured, described and illustrated using light and scanning electron microscopy. The pollen grains were medium or large sized, oblate spheroidal, suboblate, prolate spheroidal and subprolate; 4-colpate (P. kermesina), 6-12-pantocolporate (P. mediterranea), 6-colpate (P. mucronata), 6-colporate (P. pentagona), 12-colporate (P. misera) or 6-syncolpate (in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Palynotaxonomy; Passiflora; Passifloraceae; Sandbanks. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300391 |
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| Loeuille,BenoÎt; Souza-Souza,Raquel Maria Batista; Abreu,Vanessa Holanda Righetti; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| In order to evaluate the significance of the pollen morphology for generic and infrageneric taxonomy of the genus Eremanthus (Vernonieae, Asteraceae), and to provide additional data for its phylogenetic reconstruction, the pollen of 20 of the 23 species of the genus was examined using light and scanning electron microscopy. Acetolysed pollen grains were measured, described, and illustrated using light microscopy, while non-acetolysed pollen grains were analyzed using scanning electron microscopy. Pollen grains of these species are isopolar, oblate-spheroidal in most of the species, more rarely prolate spheroidal or suboblate, subtriangular amb, tricolporate and subechinolophate. The variation among quantitative characters does not correlate with the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lychnophorinae; Compositae; Taxonomy; Palynology. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000100006 |
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| Silva,Dilma Melo da; Sylvestre,Lana da Silva; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| ABSTRACT The palynological diversity of Blechnaceae in the Atlantic Forest was investigated. While the monophyletic family belongs to the group of leptosporangiate ferns, a new classification proposed by recent phylogenetic study reorganizes the family and adds new genera. To expand palynological knowledge of the group, the spore morphology of 23 species and a hybrid, distributed among 10 genera, was described. Material from herbarium collections were submitted to acetolysis and mounted on slides, with subsequent statistical analysis of spore measurements. Photomicrographs of the material were taken under both light and scanning electron microscopy. Perine ornamentation varied among psilate, rugulate and scabrate; granules and gemmae were present along... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Austroblechnum; Blechnum; Spore; Multivariate analysis; Palynology. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300412 |
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| Mezzonato-Pires,Ana Carolina; Milward-de-Azevedo,Michaele Alvim; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| ABSTRACT The subgenus Astrophea is one of the most critical and neglected subgenera of the genus Passiflora. Seven Brazilian species of P. subg. Astrophea were found to be in need of typification. Lectotypes are designated for the following names: Passiflora cauliflora, P. leptopoda, P. ceratocarpa, P. faroana, P. rhamnifolia, P. sclerophylla and P. tessmannii. An epitype was also designated for the name P. tessmannii. In addition, Passiflora alliacea was synonymized with Passiflora pentagona. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian species; Epitype; Lectotype; Nomenclature; Taxonomy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100149 |
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| Mezzonato-Pires,Ana Carolina; Mendonça,Cláudia Barbieri Ferreira; Milward-De-Azevedo,Michaele Alvim; Gonçalves-Esteves,Vania. |
| ABSTRACT The center of diversity for Passiflora subg. Astrophea is in low altitude areas of northern South America. The majority of species of this group are difficult to find in nature. Seed morphology was described in detail for 25 species of Passiflora subgenus Astrophea, a subgenus that until now did not exist. For morphological analysis, 20 seeds per species were measured for length, width and thickness, and the arithmetic means calculated. The seeds varied in length, width and thickness. Eight types of ornamentation were found. The margins varied among crestate, dentate, parted, entire and parted-crestate. The seed apex can be distinguished by the shape and position of the apical appendage. Seed shape varied among obovate, lanceolate, cordiform, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Astrophea; Fruits; Morphological characters; Seeds; Systematics. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100068 |
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| Registros recuperados: 14 | |
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