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Ciclo de Vida Pteridofitas

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Mariana Yuste Ramírez

on 1 December 2015

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Transcript of Ciclo de Vida Pteridofitas

Ciclo de Vida
Pteridofitas (s.l.)

Esporofito
Esporangio
Eusporangios
Origen: 2 o + celulas iniciales
Sesiles o pedunculados
Pared pluriestratificada,
sin anillo
# esporas indeterminado
Dehisencia pasiva
Esporas
Homosporia y Heterposporia (morfológica y/o funcional)
Triletes o Monoletes
Protalo
Monóicos o Dióicos
Fotosintéticos o subterráneos
Arquegonios
Zigoto
Gametofito

con

Esporofito joven
Meiosis
Gametofito
Lycopodium
Isoetes
Equisetum
Ophioglossum
Psilotum
Angiopteris
Adiantum
Marsilea
Azolla
Fase dominante
Cormofitas
Traqueofitas
Leptosporangios
Origen: 1 celula inicial
Pedicelados
Pared monoestratificada,
con anillo
# de esporas: multiplos de 4
Dehisencia activa
Germinación
Anteridios
Fecundación
Diploide (2n)
Haploide (n)
Full transcript