The development of the megagametophyte in Ceiba insignis (Kunth) Gibbs & Semir (Ex. Chorisia speciosa St. Hil.) (Bombacaceae)

The development of the female gametophyte in Ceiba insignis (Kunth) Gibbs & Semir has been investigated. A normal linear tetrad of megaspores is formed of which the lowermost one is functional and produces a seven-celled embryo-sac of Polygonum type. The antipodals are ephemeral. The filiform ap...

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Detalles Bibliográficos
Autores principales: Galati, Beatriz Gloria, Rosenfeldt, Sonia
Publicado: 1997
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Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319449_v47_n2_p221_Galati
http://hdl.handle.net/20.500.12110/paper_00319449_v47_n2_p221_Galati
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Sumario:The development of the female gametophyte in Ceiba insignis (Kunth) Gibbs & Semir has been investigated. A normal linear tetrad of megaspores is formed of which the lowermost one is functional and produces a seven-celled embryo-sac of Polygonum type. The antipodals are ephemeral. The filiform apparatus of the synergids is very conspicuous. An hypostase with callosic walls is present in the chalazal tissue.