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	Provedor de dados Rev. Bras. Bot. (2) Autor ESTELITA,MARIA EMÍLIA M. (2) GREGÓRIO,ELISA APARECIDA (1) MACHADO,SILVIA RODRIGUES (1) RODRIGUES,ANA C. (1) Palavra-chave Cyperaceae (1) Cyperus giganteus (1) Eriocaulaceae (1) Intercellular (1) Leaf (1) Paepalanthus superbus (1) Protuberance (1) Rhizome development (1) Secondary development (1) Ultrastructure (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2002 (1) 2000 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Primary and secondary development of Cyperus giganteus Vahl rhizome (Cyperaceae) Rev. Bras. Bot. RODRIGUES,ANA C.; ESTELITA,MARIA EMÍLIA M.. In Cyperus giganteus, like in other Monocotyledoneae, the protoderm, procambium, fundamental meristem and primary thickening meristem (PTM) are differentiated from the rhizome promeristem. The PTM produces the inner cortical parenchyma, endodermis, pericycle and amphivasal vascular bundles, which are formed by the procambium too. After the primary body differentiates, cellular divisions continue only in the pericycle, and originate an irregular vascular system with vessel elements shorter and more branched than those found in the primary growth. This change of activity in the pericycle defines a secondary growth, where the secondary thickening meristem (STM) is the pericycle itself. Tipo: Info:eu-repo/semantics/article Palavras-chave: Cyperus giganteus; Cyperaceae; Rhizome development; Secondary development. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000300001 Ultrastructure of the intercellular protuberances in leaves of Paepalanthus superbus Ruhl. (Eriocaulaceae) Rev. Bras. Bot. MACHADO,SILVIA RODRIGUES; ESTELITA,MARIA EMÍLIA M.; GREGÓRIO,ELISA APARECIDA. Mature leaves of Paepalanthus superbus exhibit intercellular protuberances between the inner periclinal walls of the epidermal and the parenchyma cells surface, as well as on the surface of the parenchyma mesophyll cells. These structures are mostly prominent around the parenchyma cells, forming a gel capsule-like structure. Histochemical tests with ruthenium red indicate the pectic nature of the intercellular deposits, with scattered lipidic inclusions as revealed by sudan IV and sudan black B. Ultrastructural analyses show a fibrillar matrix with scattered fimbriate and tubular structures, and a distinct margin delimited by a dense membrane-like structure. Our results suggest that the protuberances are derived from secretory activity, and are formed... Tipo: Info:eu-repo/semantics/article Palavras-chave: Paepalanthus superbus; Ultrastructure; Intercellular; Protuberance; Leaf; Eriocaulaceae. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000400011 Registros recuperados: 2 Primeira ... 1 ... Última

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