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biologia

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by

Roberto Cha

on 10 August 2013

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Transcript of biologia

DESARROLLO GAMETOFITO FEMENINO
FECUNDACION
Desarrollo del POLEN
ANDROCEO
Pedúnculo
Receptáculo
floral
Cáliz
Corola
GINECEO
Estambres
Teca
Meiosis

Antera
Saco polinico
Celula madre de microspora
Teca
Mitosis
Mitosis
Mitosis
Mitosis
Celula del tubo
polinico
Celula
generadora
Mitosis de célula
generadora
Grano maduro
de POLEN
Megaspora

Celula madre
Meiosis

Tres se degeneran
Por mitosis, el núcleo se
divide 8 veces
Saco embrionario
maduro
DISPERSION
La celula tubo se alarga formando
asi el TUBO POLINICO.
Los nucleos espermaticos se transportan
por el TUBO hacia el saco embrionario

Uno de los núcleos embrionarios
FECUNDA a célula huevo formando
el embrion que luego será SEMILLA
El segundo se fusiona con los
núcleos polares, formando así el NUCLEO TRIPLOIDE
REPRODUCCIÓN SEXUAL EN PLANTAS
Josefina Barra
Roberto Cha
Martina Mannori
Full transcript