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Megasporogeneza i gametogeneza kritosjemenjača<br />

Monosporni razvoj<br />

embrionske vreće<br />

Polygonum tip<br />

sporogeneza<br />

sporogena stanica<br />

2n<br />

megasporocita<br />

ili<br />

matič na stanica megaspore<br />

2n<br />

nucel<br />

(megasporangij)<br />

I<br />

megaspora<br />

n<br />

matič na stanica<br />

embrionske vreć e<br />

R<br />

megaspora<br />

n<br />

propada<br />

III<br />

sinergida<br />

1<br />

II<br />

1. stanica<br />

1. stanica<br />

gornji pol<br />

embrionske vreć e<br />

jajna<br />

stanica<br />

gametogeneza<br />

sinergida<br />

2<br />

2. stanica<br />

središ nja<br />

stanica<br />

1<br />

središ nja<br />

stanica<br />

2<br />

sekundarna jezgra (2n)<br />

3. stanica<br />

antipoda<br />

1<br />

2. stanica<br />

donji pol<br />

embrionske<br />

vreć e<br />

antipoda<br />

2<br />

4. stanica<br />

antipoda<br />

3<br />

megaspora<br />

n<br />

propada<br />

megaspora<br />

n<br />

propada<br />

embrionske vreće<br />

ili<br />

Ženski gametofit<br />

T. Nikolić Sistematska botanika-<br />

Angiospermae I<br />

9

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