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	Provedor de dados Naturalis (2) Autor Gasson, P. (2) Jansen, S. (2) Lens, F. (2) Smets, E. (2) Baas, P. (1) Palavra-chave 42.42 (1) 42.56 (1) Drought stress (1) Ecological wood anatomy (1) Epacrids (1) Ericaceae s.l. (1) Hydraulic system (1) Scalariform perforation plates (1) Simple perforation plates (1) Styphelioideae (1) Systematic wood anatomy (1) Vestured pits (1) Xylem structure (1) Mais... Tipo do documento Article / Letter to the editor (2) Ano 2004 (1) 2003 (1) País Netherlands (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Comparative wood anatomy of epacrids (Styphelioideae, Ericaceae s.l.) Naturalis Lens, F.; Gasson, P.; Smets, E.; Jansen, S.. The wood anatomy of 16 of the 37 genera within the epacrids (Styphelioideae, Ericaceae s.l.) is investigated by light and scanning electron microscopy. Several features in the secondary xylem occur consistently at the tribal level: arrangement of vessel‐ray pits, distribution of axial parenchyma, ray width, and the presence and location of crystals. The primitive nature of Prionoteae and Archerieae is supported by the presence of scalariform perforation plates with many bars and scalariform to opposite vessel pitting. The wood structure of Oligarrheneae is similar to that of Styphelieae, but the very narrow vessel elements, exclusively uniseriate rays and the lack of prismatic crystals in Oligarrheneae distinguish these two tribes. The secondary xylem of... Tipo: Article / Letter to the editor Palavras-chave: Ecological wood anatomy; Epacrids; Ericaceae s.l.; Styphelioideae; Systematic wood anatomy; 42.56. Ano: 2003 URL: http://www.repository.naturalis.nl/record/431740 Variation in xylem structure from tropics to tundra: Evidence from vestured pits Naturalis Jansen, S.; Baas, P.; Gasson, P.; Lens, F.; Smets, E.. Bordered pits play an important role in permitting water flow among adjacent tracheary elements in flowering plants. Variation in the bordered pit structure is suggested to be adaptive in optimally balancing the conflict between hydraulic efficiency (conductivity) and safety from air entry at the pit membrane (air seeding). The possible function of vestured pits, which are bordered pits with protuberances from the secondary cell wall of the pit chamber, could be increased hydraulic resistance or minimized vulnerability to air seeding. These functional hypotheses have to be harmonized with the notion that the vestured or nonvestured nature of pits contains strong phylogenetic signals (i.e., often characterize large species-rich clades with broad ecological... Tipo: Article / Letter to the editor Palavras-chave: Xylem structure; Vestured pits; Scalariform perforation plates; Simple perforation plates; Hydraulic system; Drought stress; 42.42. Ano: 2004 URL: http://www.repository.naturalis.nl/record/423503 Registros recuperados: 2 Primeira ... 1 ... Última

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