Consulta: subjectFacets:"Tracheary element"
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A comparative ultrastructural study of pit membranes with plasmodesmata associated thickenings in four angiosperm species
Provedor de dados: 16
Autores: Rabaey, D.; Lens, F.; Huysmans, S.; Smets, E.; Jansen, S.
Recent micromorphological observations of angiosperm pit membranes have extended the number and range of taxa with pseudo-tori in tracheary elements. This study investigates at ultrastructural level (TEM) the development of pseudo-tori in the unrelated Malus yunnanensis, Ligustrum vulgare, Pittosporum tenuifolium, and Vaccinium myrtillus in order to determine whether these plasmodesmata associated thickenings have a similar developmental pattern across flowering plants. At early ontogenetic stages, the formation of a primary thickening was observed, resulting from swelling of the pit membrane in fibre-tracheids and vesselelements. Since plasmodesmata appear to be frequently, but not always, associated with these primary pit membrane thickenings, it remains...
Tipo: Article / Letter to the editor
Palavras-chave: Ontogeny; Pseudo-torus; Tracheary element; Pit membrane; Bordered pit; Wood ultrastructure; 42.56.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/430078