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| Registros recuperados: 25 | |
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| Dang, C; De Montaudouin, X; Gonzalez, P; Mesmer Duldons, N; Caill-milly, Nathalie. |
| We describe an emerging pathology, brown muscle disease (BMD), which specifically affects the Manila clam Ruditapes philippinarum in Arcachon Bay (France). BMD induces a transformation of the posterior adductor muscle, which becomes infused by conchiolin and calcified, reducing the ability of clams to bury. The disease affects both types of muscular tissue, with striated muscle becoming affected to a higher degree than smooth muscle. Two indices were created to quantify the symptoms: the Muscle Print Index, used for empty and live shells, and the Final Disease Index, utilized for live clams only. Histological sections were made and observed under light microscopy to examine the muscular damage and to investigate a causal agent. Sections revealed an... |
| Tipo: Text |
Palavras-chave: Light microscopy; Pathology; Adductor muscle; Ruditapes philippinarum; Clam; Brown muscle disease. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/2008/publication-4556.pdf |
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| Lens, F.; Jansen, S.; Caris, P.; Serlet, L.; Smets, E.. |
| The wood structure of 78 species from 27 genera representing the woody primuloids (Maesaceae, Myrsinaceae, and Theophrastaceae) was investigated using light microscopy (LM) and scanning electron microscopy (SEM). Results indicated that the ray structure, the nature of mineral inclusions, and the occurrence of breakdown areas in rays can be used to separate the three primuloid families from each other. Within Ericales, the presence of exclusively multiseriate rays is synapomorphic for Myrsinaceae and Theophrastaceae, and the occurrence of breakdown areas in rays is synapomorphic for Myrsinaceae. Within Myrsinaceae, the wood structure of the mangrove genus Aegiceras differs because it has short vessel elements that are storied, non-septate fibers, a... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Primuloids; Ericales s.l.; Maesaceae; Myrsinaceae; Theophrastaceae; Wood anatomy; Comparison; Light microscopy; Scanning electron microscopy. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/407307 |
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| Hamann, T.; Smets, E.; Lens, F.. |
| Bark anatomy is an unappreciated discipline in plant systematics, despite its great potential to reveal systematically informative features. In this paper, main reasons for the lack of detailed bark anatomical data in many plant families are identified, including problems with sectioning, terminological issues, and difficulties in observation of dilated stems. We deal with these problems by focusing on two aspects: (1) compare, discuss and improve existing sectioning and maceration techniques using two species with soft and hard bark tissues; and (2) discuss the best way to collect stem bark samples. We hope that this paper will stimulate inclusion of bark anatomical data in future systematic studies. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bark anatomy; Light microscopy; Macerations; Plant systematics; Phloem; Sectioning; 42.54. |
| Ano: 2011 |
URL: http://www.repository.naturalis.nl/record/421834 |
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| Geraldo,I; Mahecha,GAB; Martins,NRS. |
| Epididymal lithiasis (EL) histopathology is described using light and electronic microscopy in roosters (Gallus gallus domesticus) naturally affected by EL in Minas Gerais, Brazil. The histologic and morphological changes by EL in roosters was performed regarding cellular and subcellular details through light and electron microscopy. Efferent ductules epithelium lysosomal increase in size and numbers, membrane rupture, cellular vacuolation, ciliary loss, basal membrane degeneration, inflammatory reaction with mononuclear infiltrations, edema, epithelial and vascular endothelium losses were described. All industrial and freerange chickens showed EL in varying degrees in the efferent ductules (ED). However, ED altered areas did not correlate with the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epididymal lithiasis; Histopathology; Light microscopy; Electron microscopy; Gallus gallus domesticus; Infertility; Rooster; Testicular calculus. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000100004 |
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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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| Zanetti,Camila Aparecida; Barbosa,Suzana Bissacot; Adachi,Sérgio Akira; Marcelli,Marcelo Pinto. |
| ABSTRACT The genus Punctelia has been traditionally characterized by the type and distribution of pseudocyphellae, medullary chemical substances and the shape of conidia, whereas its species have been distinguished using mainly the shape, location, abundance and size of pseudocyphellae. Given that Punctelia is not monophyletic, additional studies are needed to determine its current delimitation. The present study used conventional techniques for structural studies using optical and scanning electron microscopy in order to describe and compare the structure and ontogeny of the pseudocyphellae of five species of Punctelia. The main differences among the studied species involve the type of pseudocyphellae development, the presence or absence of an epicortex... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aeroplectenchyma; Lichen anatomy; Light microscopy; Parmeliaceae; Plectenchyma; Pseudocyphellae; Punctelia. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100051 |
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| Shibata, Marília; Coelho, Cileide Maria Medeiros; Schmidt, Eder Carlos; Bouzon, Zenilda Laurita; Campos, José Marcello Salabert de; Maraschin, Marcelo. |
| This study aimed at assessing the cell cycle, and anatomical and biochemical changes that the embryonic axis of Araucaria angustifolia undergoes during development, focusing on the maturation stage. During all development, cells exhibited intense metabolic activity with an abundance of mitochondria, lipid bodies, and vacuolated cells. The continued accumulation of starch and protein was observed by LM and TEM and indicated by spectra of FTIR. Cell differentiation of the procambium was observed with a thickening of the cell wall and the formation of resiniferous ducts. At Stage III and IV, cells exhibited structural changes such as altered or elongated mitochondria and presence of plastoglobules. These results suggest that there is a gradual transition from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.03.00.00-0 Botânica; 2.03.03.00-9 Fisiologia Vegetal; 5.02.01.04-2 Sementes Florestais maturation; Recalcitrant seed; Light microscopy; Transmission electron microscopy; Flow cytometry Botânica. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/43381 |
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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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| Registros recuperados: 25 | |
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