Palynology
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. Morfologia polínica de espécies de Bonamia Thouars, Evolvulus L. e Jacquemontia Choisy (Convolvulaceae) ocorrentes numa região de ecótono no município de Caetité, BA, Brasil
RESUMO A morfologia polínica de 17 táxons de Convolvulaceae [Bonamia agrostopolis, Evolvulus (nove espécies) - Tribo Cresseae) e Jacquemontia (sete espécies) - Tribo Jacquemontieae)] foi descrita sob microscopia de luz (ML) e microscopia eletrônica de varredura (MEV) com objetivo de contribuir com a palinologia e taxonomia do grupo. O material polinífe
Hoehnea. Publicado em: 04/07/2019
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2. Palynology of Amphidium Schimp. (Amphidiaceae M. Stech): can spore morphology circumscribe the genus?
ABSTRACT Amphidium Schimp. is characterized by cushion-forming erect primary stems, linear-lanceolate leaves, and gymnostome capsules. The phylogenetic position of Amphidium is uncertain, with the genus having been variously included in Zygodontaceae Schimp., Rhabdoweisiaceae Limpr., Orthotrichaceae Arn. and Amphidiaceae M. Stech. A palynological investigati
Acta Bot. Bras.. Publicado em: 2019-03
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3. Comparative pollen morphological analysis in the subgenera Passiflora and Decaloba
ABSTRACT The genus Passiflora is the most diversified of the Passifloraceae, and its palynology presents wide morphological variability. The objective of the study was to evaluate the pollen morphology of 18 Passiflora species in order to identify informative pollinic characteristics to contribute to the taxonomic classification of the genus. The morphology
An. Acad. Bras. Ciênc.. Publicado em: 16/10/2017
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4. Pollen morphology of Waltheria L. (Malvaceae-Byttnerioideae) from Bahia, Brazil
ABSTRACT Waltheria encompasses about 60 species distributed in Brazil and Mexico. To improve the palynology of the genus, we analyzed 14 species occurring in the Brazilian State of Bahia. Pollen grains were acetolyzed and examined using light microscopy and scanning electron microscopy. Non-acetolyzed pollen grains were viewed by transmission electron micros
Acta Bot. Bras.. Publicado em: 21/09/2017
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5. Pollen diversity in selected species of the tribe Chironieae (Gentianaceae Juss.) that occur in the Atlantic Forest, Brazil
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:
Acta Bot. Bras.. Publicado em: 2017-03
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6. Estudo palinoestratigráfico e de petrografia orgânica do Cretáceo inferior da Bacia do Recôncavo / Palynostratigraphic and organic petrography studies of the Recôncavo basin early Cretaceous deposits
The present study was based on vertical variations analysis of the organic matter from 50 core samples collected from the well 9-FBA-61-BA, allowing better understanding of the Early Cretaceous of Reconcavo Basin palynological and palynofacies characteristics. Observations throughout combined light and blue light/UV fluorescence techniques, permitted to defi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2011
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7. Environmental changes in the western Amazônia: morphological framework, geochemistry, palynology and radiocarbon dating data
Os sedimentos do lago Coari, de ambiente de terra firme eesculpido nos depósitos do Plio-Pleistocenos, e o Acará, típico lago de várzea e ambos formados nos sedimentos quaternários da planície de inundação do médio Solimões, no oeste da Amazônia, Brasil, foram estudados para investigar as condições ambientais durante sua formação. Este estudo
Anais da Academia Brasileira de Ciências. Publicado em: 05/08/2011
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8. Vila Maria Formation (Silurian, Paraná Basin, Brazil): integrated radiometric and palynological age determinations
Fresh shale samples taken from a well-known outcrop section of the Silurian Vila Maria Formation, located on the northeastern margin of the Paraná Basin (Três Barras Farm, Goiás State, central-western Brazil), have been analysed for both palynological and radiometric age determinations. The rocks yielded a fairly diverse, age-definitive cryptospore assemb
Publicado em: 2011
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9. Registros palinológicos inéditos nas formações Teresina e Rio do Rasto (Permiano, Grupo Passa Dois, Bacia do Paraná): implicações biocronoestratigráficas e paleoambientais
The Pennsylvanian-Permian interval of the Paraná Basin is relatively well-known on its palynological content. However, little has been published from the Permian Serra Alta, Teresina and lower Rio do Rasto formations (Passa Dois Group). A total of thirty seven core samples were collected along a vertical range of 600 meters of these units in two boreholes i
Publicado em: 2011
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10. Palinologia em sedimentos quaternários, localizados na Estação do Instituto Florestal de Jataí, SP / Palynology of quaternary sediments, located on the Ecological Station of Jataí, SP
O estudo de uma trincheira coletada em um meandro abandonado, as margens do Rio Mogi-Guaçú, em uma área coberta por Cerrado, na Estação do Instituto Florestal de Jataí, Município de Luís Antônio (SP), permitiu realizar estudos pertinentes a evolução paleoambiental e, possíveis inferências paleoclimáticas, ao longo dos últimos 10.251 anos A.P.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2010
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11. Análise palinotaxonômica e bioestratigráfica da subturma monosaccites na Bacia do Paraná, Brasil. I : Plicatipollenites Lele 1964 e Crusisaccites Lele & Maithy 1965 / Palynotaxonomic and biostratigraphic analysus of the subturma monosaccites in the Paraná basin , Brazil. L. Plicatipollenites Lele 1964 and crucisaccites Lele & Maithy 1965
Publicado em: 2010
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12. Contribuição à paleoecologia da Amazônia Meridional na planície de inundação do Rio Teles Pires, do norte do Estado do Mato Grosso
Records of isotopic and elemental carbon and nitrogen and pollen in lake sediments and soils have been used for studies of Quaternary paleoecology worldwide, including in the Amazon at specific sites, such as the region of Carajas, Lake Pata and Region Porto Velho in Rondonia state making it necessary to register in the central southern region. We collected
Publicado em: 2010