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| Registros recuperados: 62 | |
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| Saba,Marileide Dias; Esteves,Gerleni Lopes; Santos,Valdira de Jesus; Santos,Francisco de Assis Ribeiro dos. |
| ABSTRACT The pollen grains of 15 species belonging to five genera (Ceiba Mill., Eriotheca Schott & Endl., Pachira Aubl., Pseudobombax Dugand, and Rhodognaphalopsis A. Robyns) of the subfamily Bombacoideae (Malvaceae s.l.) were acetolysed, measured, described and photomicrographed under light microscopy and scanning and transmission electron microscopy, in order to characterize the pollen morphology of species of the subfamily occurring in Brazil. The pollen characters studied were size, shape, exine constitution, and apertural type. Pollen grains were medium to large-sized and isopolar with a (sub)circular and (sub)triangular amb with flat, convex or concave sides; oblate to suboblate; 3(-4)-colp(or)ate or 4-5(-6)-colporate, planaperturate,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ceiba; Pachira; Palynology; Pseudobombax; SEM; TEM. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100094 |
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| Freitas,Aline Gonçalves de; Carvalho,Marcelo de Araujo; Mendonça,Claudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| Here, we describe pollen grains extracted from a Pleistocene-Holocene sediment core (BU-91-GL-05; 22°48'45"S; 41°54'13"W) taken from the Albacora Slope (22°48'45"S; 41°54'13"W), located in the Campos Basin of the northern region of the state of Rio de Janeiro, Brazil. The analysis resulted in the identification and morphological description of 46 types of pollen: one of a gymnosperm genus (Podocarpus); and 45 of angiosperm taxa across 27 families-one family of monocotyledons (Poaceae) and 26 families (30 types) of dicotyledons. The most common angiosperm families were Amaranthaceae (Chenopodium, Amaranthus and Gomphrena); Fabaceae (Fabaceae type, Bauhinia, Inga and Canavalia); Malpighiaceae (Tetrapteris, Heteropteris and Peixotoa); Malvaceae (Sida,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Palynology; Pollen descriptions; Paleovegetation; Quaternary; Campos Basin. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400016 |
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| Teixeira,Michella Del Rei; Amorim,André Márcio; Santos,Francisco de Assis Ribeiro dos. |
| There have been few palynological studies of the family Menispermaceae. Here, we analyzed the pollen grains of 12 species from seven genera of Menispermaceae occurring in the state of Bahia, Brazil: Abuta selloana Eichl.; Borismene japurensis (Mart.) Eichl.; Chondrodendron microphyllum (Eichl.) Moldenke; C. platyphyllum (A.St.-Hil.) Miers; Cissampelos andromorpha DC.; C. ovalifolia DC.; C. pareira L.; C. sympodialis Eichl.; Hyperbaena domingensis (DC.) Benth.; Odontocarya duckei Barneby; Sciadotenia campestris Barneby; and S. pubistaminea (K. Schum.) Diels. The pollen grains were acetolysed, measured, described, and illustrated using light and scanning electron microscopy. The pollen grains were found to be small, oblate spheroidal or prolate spheroidal,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Palynology; Taxonomy; Stenopalynous. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200016 |
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| Ferreira,Marcos Gonçalves; Absy,Maria Lúcia. |
| We applied an "adapted" protocol for collecting and processing pollen grains in the pollen analysis of the post-emergence residue of Melipona (Melikerria) interrupta Latreille. The study was conducted at the Sant'Ana honey farm, located on the banks of the Solimões River, in the municipality of Manacapuru, in the state of Amazonas, Brazil, where a colony was monitored in October and November 2010. From that colony, 10 samples of post-emergence residue were collected. Unlike in the acetolysis method, there was no need to expose pollen grains to an acidic medium, because pollen loses its content during the larval digestive process. We identified 32 pollen types, from 19 botanical families, plus three undetermined pollen types. The most representative family... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stingless bees; Palynology; Pollen; Floral resources. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400009 |
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| Shabestari,Elaheh Sadat Bagheri; Attar,Farideh; Riahi,Hosein; Sheidai,Masoud. |
| The genus Centaurea L. is one of the largest genera in the family Asteraceae. The number of taxa included in this genus ranges from 500 to 600 worldwide. Iran is one of the major centers of diversity for this genus. Pollen morphology has proved useful in the systematics of Asteraceae, as well as in that of some of its genera and species. The pollen morphology of 19 taxa of the genus Centaurea was investigated in detail by light and scanning electron microscopy. Examination under light microscopy showed pollen grains to be tricolporate, isopolar, radially symmetrical, oblate spheroidal, prolate spheroidal, subprolate, tectum perforate and scabrate. Based on the exine ornamentation observed under scanning electron microscopy, we identified two types of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Centaurea; Palynology; Exine ornamentation; Light microscopy; Scanning electron microscopy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400004 |
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| Avelino,Luciano Oliveira; Santos,Francisco de Assis Ribeiro dos. |
| ABSTRACT Propolis is a resin-like substance composed mainly of resin, wax, essential oils, pollen grains and specific plant parts collected by the honeybee Apis mellifera, which mixes them with fluids they secrete. The components and chemical properties of propolis vary among regions. Therefore, in order assess variation in the botanical composition of propolis, 26 samples of propolis (brown, red, and green) produced throughout northeastern Brazil were analyzed by acetolysis specifically adapted for propolis. In total, 196 pollen types were recorded, representing 123 genera and 47 families, with types of Fabaceae and Rubiaceae being present in 100 % of the samples. Fabaceae was the richest group with 49 pollen types, followed by Malvaceae (10 types),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apiculture; Apis mellifera; Beekeeping; Palynology; Pollen grains. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400602 |
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| Feitosa,Yuri Oliveira; Absy,Maria Lúcia; Latrubesse,Edgardo Manuel; Stevaux,José Cândido. |
| The present study reconstructs the paleovegetation of a varzea (seasonally flooded) forest in the central parts of the Madeira River floodplain in Brazil using palynological data. Forty-nine cut-bank sediment samples from the Madeira River were processed in the study; from these, ten samples contained pollen: two contained pollen from the Middle Pleniglacial age, one contained pollen from the Tardiglacial age, six contained pollen from the Holocene, and one contained more recently deposited pollen. The Middle Pleniglacial pollen belonged to a primary succession varzea forest, while the Tardiglacial pollen represented a late succession varzea forest. On the other hand, the three Holocene samples showed the characteristic composition of chavascal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cut-bank sediment; Late Pleistocene-Holocene; Palynology; Southern Amazonian tributary; Varzea. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000100120 |
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| Gonçalves-Esteves,Vania; Vieira,Gabrielle Reboredo Menezes; Carvalho,Renata Jacomo Paixão de; Crespo,Sonia Regina de Melo; Mendonça,Claudia Barbieri Ferreira. |
| ABSTRACT This work aimed to morphologically characterize 22 species of Spermacoceae s.s found in the Atlantic Forest in the state of Rio de Janeiro with the purpose of improving palynological knowledge of the studied species. The studied species included six species of Borreria and Denscantia cymosa, Emmeorhiza umbellata, Hexasepalum apiculatum, H. radula, H. teres, Manettia fimbriata, Mitracarpus eichleri, M. frigidus, M. hirtus, M. lhotzkyanus, M. megapotamicus, Oldenlandia salzmannii, Pentodon pentandrus, Richardia brasiliensis, Richardia scabra and Spermacoce rubescens. Acetolysed pollen grains were analyzed using light (LM) and scanning electron miscroscopy (SEM). The pollen grains varied in size (polar diameter) from medium to large, with the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gentianales; Multivariate analysis; Palynology; Rubioideae; Systematics. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000200243 |
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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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| Ferreira,Marcos Gonçalves; Absy,Maria Lúcia; Gonçalves-Esteves,Vânia. |
| A pollen morphology study of the Gentianaceae Juss. of Reserva Florestal Adolpho Ducke (Manaus, Brazil) was performed. The pollen grains of the studied species varied morphologically in their pollen units (tetrads or monads), size (small, medium and large), shape (oblate, suboblate, oblate spheroidal, spheroidal, prolate spheroidal and prolate), polarity (heteropolar, isopolar or subisopolar), symmetry (bilateral or radial) and number and type of aperture (3-colporate and 1-3porate). In relation to ornamentation, pollen grains had a sexine that was psilate in the Voyria species, microreticulate in Voyriella parviflora and reticulate heterobrochate in Tachia grandiflora and Irlbachia alata. The exine in I. alata showed great variability in the size and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon forest; Neotropical species; Palynology; Taxonomy. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000400020 |
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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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| Araújo,Rita de Cássia Matos dos Santos; Nunes,Teonildes Sacramento; Saba,Marileide Dias; Andrade,Brunelle Ramos; Nascimento,Anacleide Pereira do; Santos,Francisco de Assis Ribeiro dos. |
| ABSTRACT This study aims to expand knowledge of the pollen morphology of Passifloraceae and contribute to the taxonomic delimitation of the group by morphologically characterizing pollen grains of species that occur in the Brazilian state of Bahia. Thirty-six species occur in the state, one of the genus Mitostemma (M. glaziovii) and 35 of the genus Passiflora. Pollen samples were acetolysed, measured, and described using light and scanning electron microscopy. The results group the studied species into four pollen types based mainly on aperture type and number, opercular variation, and the presence/absence of ornamentation elements inside the lumina of the reticulum: Pollen type I - species belonging to the subgenera Astrophea and Deidamioides; pollen type... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Mitostemma; Passiflora; Palynology; Pollen morphology; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100054 |
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| Moreira,Fábio de França; Vaz,Ângela Maria Studart da Fonseca; Mendonça,Claudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| We analyzed the pollen grains of 30 taxa of the genus Bauhinia L., within five series: Aculeatae (9 species); Acuminatae (1 species); Cansenia (17 species); Pentandrae (2 species); and Perlebia (1 species). The pollen grains were acetolysed, after which they were photographed and analyzed under light microscopy. Non-acetolysed pollen grains were analyzed under scanning electronic microscopy. Characters such as shape, size, exine and aperture constitution were studied. The species were separated by a dichotomous key, which showed pollen grains that were classified as very large; isopolar or apolar; oblate, suboblate, oblate spheroidal or spherical; large or small in terms of the polar area; inaperturate, 3-porate or (3-7)-colpate; and microreticulate or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bauhinia; Brazil; Leguminosae; Palynology. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200014 |
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| Registros recuperados: 62 | |
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