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	Provedor de dados Naturalis (3) Acta Botanica (1) Autor Lens, F. (3) Jansen, S. (2) Rabaey, D. (2) Smets, E. (2) Angyalossy,Veronica (1) Botânico,Marli Pereira (1) Choat, B. (1) Janssen, S. (1) Pace,Marcelo Rodrigo (1) Pletsers, A. (1) Schols, P. (1) Vinckier, S. (1) Mais... Palavra-chave Tracheary elements (4) Pit membrane (2) Torus (2) Wood anatomy (2) 42.48 (1) 42.56 (1) 42.58 (1) Bordered pits (1) Ericaceae (1) Ericales (1) Growth habit (1) Leaf (1) Light microscopy (1) Monocotyledons (1) Myrtales (1) Oleaceae (1) Pit structure (1) Plasmodesmata (1) Pseudo-torus (1) Root (1) Mais... Tipo do documento Article / Letter to the editor (3) Info:eu-repo/semantics/article (1) Ano 2011 (1) 2008 (1) 2006 (1) 2004 (1) País Netherlands (3) Brazil (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última The Micromorphology of Pit Membranes in Tracheary Elements of Ericales: New Records of Tori or Pseudo-tori? Naturalis Rabaey, D.; Lens, F.; Smets, E.; Janssen, S.. Background and Aims Intervascular pit membranes were examined within Ericales to determine the distribution and structure of torus-like thickenings. Methods Forty-nine species representing 12 families of the order Ericales were investigated using light, scanning and transmission electron microscopy. They were compared with four species of Oleaceae to determine the true nature of the thickenings. Key Results Pit membranes with torus-like thickenings were observed in seven species of Ericaceae and were found to be amorphous, plasmodesmata-associated structures with an irregular distribution. These pseudo-tori show major differences compared with true tori with respect to their distribution and ultrastructure. Genuine tori, which are strongly correlated... Tipo: Article / Letter to the editor Palavras-chave: Ericaceae; Ericales; Oleaceae; Pit membrane; Plasmodesmata; Pseudo-torus; Torus; Tracheary elements. Ano: 2006 URL: http://www.repository.naturalis.nl/record/407321 Vestured pits: a diagnostic character in the secondary xylem of Myrtales Naturalis Jansen, S.; Pletsers, A.; Rabaey, D.; Lens, F.. Vestures are small projections from the secondary cell wall associated with tracheary elements of the secondary xylem. They are usually associated with bordered pits and characterize various angiosperm families, including important timber species such as Dipterocarpaceae and Eucalyptus trees. The micromorphology and distribution of vestures were studied in 22 species representing all families within the order Myrtales based on light and scanning electron microscopy. Vestures are consistently present near the outer pit aperture of bordered vessel pits, suggesting the synapomorphic character of this feature for the entire order. It is unclear in which geological period this feature originated in the evolution of the pre-Myrtalean lineages. In some species... Tipo: Article / Letter to the editor Palavras-chave: Vestures; Wood anatomy; Bordered pits; Myrtales; Scanning electron microscopy; Light microscopy; Tracheary elements; 42.48; 42.56. Ano: 2008 URL: http://www.repository.naturalis.nl/record/498037 Intervascular pit membranes with a torus in the wood of Ulmus (Ulmaceae) and related genera Naturalis Jansen, S.; Choat, B.; Vinckier, S.; Lens, F.; Schols, P.; Smets, E.. • The distribution of intervascular pit membranes with a torus was investigated in juvenile wood samples of 19 species of Ulmus and seven related genera. • A staining solution of safranin and alcian blue (35 : 65) was recommended to distinguish torus-bearing pit membranes using light microscopy. • Intervascular pit membranes connecting relatively wide vessel elements resembled those of most angiosperms, as they were of uniform thickness. By contrast, bordered pit pairs with round to oval pit apertures and indistinct pit canals that connected narrow (incomplete) vessel elements or vascular tracheids with distinct helical thickenings were frequently characterized by a torus in ring-porous wood samples of Ulmus and Zelkova. Tori were lacking in... Tipo: Article / Letter to the editor Palavras-chave: Ulmus (elm); Ulmaceae; Pit membrane; Torus; Pit structure; Wood anatomy; Tracheary elements; 42.58. Ano: 2004 URL: http://www.repository.naturalis.nl/record/423388 Diversity of metaxylem vessel elements in three Syagrus palms (Arecaceae) of different habits Acta Botanica Pace,Marcelo Rodrigo; Botânico,Marli Pereira; Angyalossy,Veronica. Vessel elements in Monocotyledons present morphological differences according to the organ where they occur. Usually such diff erences have been explained from an evolutionary perspective, with few data on how the vessel elements could be infl uenced by the diff erent functions of organs and the growth habits of the plants. To address this question, three vegetative organs of palms of the same genus, Syagrus, growing in similar environments, but with different habits, were analyzed. Accordingly, we aimed to detect whether the vessel elements would present similar features in all species or whether the vessel elements would change according to their different habits. We found that the width and type of perforation plates varied in the same way among all... Tipo: Info:eu-repo/semantics/article Palavras-chave: Monocotyledons; Tracheary elements; Vegetative organs; Growth habit; Root; Stem; Leaf. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000200007 Registros recuperados: 4 Primeira ... 1 ... Última

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