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Souza,Margarete Magalhães de; Pereira,Telma Nair Santana; Hoffmann,Magali; Melo,Edésio J.T. de; Louro,Ricardo Pereira. |
The yellow passion fruit, Passiflora edulis f. flavicarpa, is one of the most important Brazilian fruit crops. It is an allogamous, diploid, and self-incompatible species. It has hermaphrodite, solitary flowers, located in the leaf axils and protected by leaf bracts. The flower has an androgynophore, which is a straight stalk supporting its reproductive parts. There are usually five anthers, located at the tip of each of the five filaments. The ovary is borne just above the filaments, at the top of the androgynophore; there are three styles that are united at their base, and at the top there are three stigmas. The objective of this research was to observe embryo sac development in yellow passion flowers. Ovaries at different stages of development were... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg cell; Embryo sac; Passifloraceae; Yellow passion fruit; Passiflora edulis f. flavicarpa Deg.; Confocal microscopy; Megagametogenesis. |
Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400017 |
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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 |
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