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	Provedor de dados Rev. Bras. Bot. (2) Autor Mariath,Jorge E.A. (2) Moço,Maria C.C. (2) Palavra-chave Adesmia (2) Embryology (2) Leguminosae (2) Embryo sac (1) Female gametophyte (1) Megaspore (1) Ovule (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2004 (1) 2003 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Female gametophyte development in Adesmia latifolia (Spreng.) Vog. (Leguminosae - Papilionoideae) Rev. Bras. Bot. Moço,Maria C.C.; Mariath,Jorge E.A.. The female gametophyte has a monosporic origin and a Polygonum type development. The female gametophyte growth consumes a large part of the neighboring nucellar cells and, in the micropylar region, part of the nucellar epidermis and internal integument. The mature gametophyte is composed of only four cells due to the ephemeral characteristic of the antipodals. The synergids are pear-shaped cells with the formation of filiform apparatus. Their nuclei lie in the micropylar region and large vacuoles in the chalazal region, while the egg cell presents an opposite polarization. The central cell accumulates starch grains and the two polar nuclei approach the egg. Occasional development of two gametophytes was recorded. The closest to the micropyle develops... Tipo: Info:eu-repo/semantics/article Palavras-chave: Adesmia; Embryo sac; Embryology; Female gametophyte; Leguminosae. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000200004 Ovule ontogenesis and megasporogenesis in Adesmia latifolia (Spreng.) Vog. (Leguminosae-Papilionoideae) Rev. Bras. Bot. Moço,Maria C.C.; Mariath,Jorge E.A.. The ovule ontogenesis and the megasporogenesis events were studied under bright field, fluorescence and scanning electron microscopy. The primordium is 3-zonate and gives rise to a hemianatropous, bitegmic and crassinucellate ovule. The archesporium may consist of one or more archesporial cells, but only one undergoes meiosis, forming a linear tetrad. Normally, only a single megaspore is functional in the chalazal position, but occasionally two functional chalazal megaspores arise. The present study provides additional information on embryological characters in the Adesmieae tribe and discusses their taxonomic significance to the Leguminosae family. Tipo: Info:eu-repo/semantics/article Palavras-chave: Adesmia; Embryology; Leguminosae; Megaspore; Ovule. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000400008 Registros recuperados: 2 Primeira ... 1 ... Última

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