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| Registros recuperados: 73 | |
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| Sarwar,Abul Khayer Mohammad Golam; Hoshino,Yoichiro; Araki,Hajime. |
| Pollen morphology of 52 species (out of c. 79) of the Bomarea subgenus Bomarea was examined using light microscopy and scanning electron microscopy (SEM), or using SEM alone. The studied species of Bomarea were stenopalynous, characterized by large, oblate, monosulcate monads with reticulate exine sculpture in most species. Wide variation was observed in quantitative palynological features. The studied taxa were divided into four major groups based on exine ornamentation observed under SEM: microreticulate, reticulate, coarsely rugulate, and psilate-perforate. The reticulate exine sculpture may be a plesiomorphic character state for the genus Bomarea, and the coarsely rugulate and finely rugulate-perforate or psilate-perforate exine sculptures may have... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agglomerative hierarchical clustering; Bomarea; Exine sculpture; Infrageneric classification; Scanning electron microscopy. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400586 |
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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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| Sarwar,Abul Khayer Mohammad Golam; Hoshino,Yoichiro; Araki,Hajime. |
| ABSTRACTPollen morphology of 24 of the 33 species of three Bomareasubgenera, Baccata, Sphaerine, andWichuraea, was examined by light microscopy (LM) and scanning electron microscopy (SEM), or SEM alone. The studied species ofBomarea were stenopalynous, characterized by large, monosulcate monads with reticulate exine sculpture in most species. Opercula-like structures were present on the sulcus in B.huanucoand B.involucrosa. Differences in pollen size, exine thickness, and exine sculpture were observed. The studied taxa were divided into four major groups based on exine ornamentation observed under SEM: microreticulate, reticulate, coarsely rugulate, or finely rugulate-perforate. Pollen characters alone did not appear to correlate clearly with the current... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bomarea; Exine sculpture; Infrageneric classification; Opercula-like structures; Scanning electron microscopy. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300425 |
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| Soares,Taliane Leila; Jesus,Onildo Nunes de; Souza,Everton Hilo de; Santos-Serejo,Janay Almeida dos; Oliveira,Eder Jorge de. |
| The characterization and viability of pollen grains are useful tools to guide crosses in breeding programs. The objective of this study was to describe the morphological patterns and viability of pollen grains from five accessions of Passiflora edulis f. flavicarpa O. Deg. and five accessions of Passiflora setacea DC. Pollen morphology descriptions were made using light microscopy and scanning electron microscopy, whereas the viability analysis was performed by in vitro germination and histochemical analysis (Lugol's solution and 2,3,5-triphenyltetrazolium chloride). Pollen grains assessed for germination were inoculated in culture medium containing Ca(NO3).4H2O (0.03%), Mg(SO4).7H2O (0.02%), KNO3 (0.01%), H3BO3 (0.01%), sucrose (15%) and agar (0.8%).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: In vitro germination; Histochemistry; Scanning electron microscopy; Passifloraceae; Pollen tube. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400018 |
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| Rossi, Zélia Terezinha Teixeira; Castro, Evaristo Mauro de; Pereira, Giuslan Carvalho; Barbosa, João Paulo Rodrigues Alves Delfino; Carvalho, Graziele Wolff de Almeida; Rossi, Marco Aurélio de Lima Silva; Pereira, Fabrício José. |
| Fluorides released during the manufacture of aluminum, fertilizers, glass and ceramics are considered to be highly toxic to plants, causing damages in relatively small concentrations. This study aimed to evaluate fluoride (F) accumulation and its effects on Vitex polygama Cham. (Verbenaceae) exposed to simulated rain containing potassium fluoride in concentrations of 5, 10, 15 and 20 mg L-1. Vitex polygama presented no visual symptoms of foliar injury and accumulated a relatively small amount of F-, significant only for the treatments with higher concentrations of the pollutant. F- promoted an increase in non-photochemical quenching (qN) and in the coefficient due to non-photochemical extinction (NPQ), which indicates higher dissipation of radiant energy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.03.00.00-0; 2.03.02.03-7; 2.03.03.00-9 chlorophyll a fluorescence; Potassium fluoride; Scanning electron microscopy; Transmission electron microscopy; Biomonitoring studies Botânica; Anatomia Vegetal; Fisiologia Vegetal. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31400 |
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| ROSSI,MÔNICA L.; SOUZA,EVERTON H.; GRANER,ERIKA M.; ALMEIDA,MARCÍLIO DE; MARTINELLI,ADRIANA P.. |
| Abstract Stevia rebaudiana belongs to the Asteraceae family with high economic and medicinal potential. This article describes and illustrates morphological and histological aspects of leaves and reproductive organs, and the germination process, to provide detailed information on this species and to contribute to taxonomic, phylogenetic and pharmacobotanical projects. The fruit is a cypsela, small, simple, dry, indehiscent, monospermic, light or dark colored, with aristate pappus, and the seed presents a spatulate axile embryo. Germination is phaneroepigeal with a pivotal root system and many absorbing root hairs. The leaves are simple, elliptical to obovate, with two types of trichomes (glandular and tector), with a short petiole, exhibiting an opposite... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomy; Germination; Light microscopy; Morphology; Scanning electron microscopy. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502167 |
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| Vora,Shruti Dineshbhai; Kumar,Vineet; Asodiya,Foram Arvindbhai; Singh,Vivek Kumar; Fefar,Dhaval Tribhovanbhai; Gajera,Harsukh Popatbhai. |
| Abstract The purpose of the study was to develop a xenogenic bubaline diaphragm matrix (BDM) for abdominal hernia repair. A fresh diaphragm was decellularized using aqueous sodium dodecyl sulfate (SDS) solutions (0.5-4% w/v) over a period. Acellularity was confirmed histologically and characterized by Masson’s trichrome staining, scanning electron microscopy (SEM), DNA quantification, agarose gel electrophoresis, and Fourier-transform infrared spectroscopy. The BDM was used for clinical abdominal hernia repair in six cattle. Clinical, hemato-biochemical and antioxidant parameters were evaluated to assess biocompatibility of xenogenic BDM. Histologically, the diaphragm treated with 2% SDS for 48 h showed complete acellularity and orderly arranged collagen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biocompatibility; Bubaline diaphragm matrix; DNA quantification; Spectroscopy; Scanning electron microscopy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100309 |
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| Pinto,Teresa Maria; Anjos,Maria do Rosário; Martins,Nuno Miguel; Gomes-Laranjo,José; Ferreira-Cardoso,Jorge; Peixoto,Francisco. |
| The aim of this work was to perform the histological characterization of the C. sativa leaves of three Portuguese cultivars to establish comparison among the leaves of the different quadrants in accord and with the cardinal points of the tree top and among different cultivars of this species, using light microscopy (OM) and scanning electron microscopy (SEM). Measurements were also carried out for the leaf tissue thickness, stomatal density, leaf area in the four tree top quadrants. The leaves turned to the North had lesser thickness of mesophyll mainly due to lower amount of palisade parenchyma. The stomatal density was significantly lower in these leaves, unlike the leaf area that has the highest expression. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C. sativa; Leaf anatomy; Palisade parenchyma; Spongy parenchyma; Stomatal density; Scanning electron microscopy. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100016 |
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| Registros recuperados: 73 | |
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