Download - PPT LA PLANTE
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REPRODUCEREA LA PLANTE
MOTTO:
TOT CE E VIU ASPIRA LA CULOARE…
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CUPRINS:• REPRODUCEREA ASEXUATA• LUCRARI• REPRODUCEREA SEXUATA• ELEMENTELE FLORALE• FUNCTIILE FLORII• SAMANTA• FACTORII CE INFLUENTEAZA
GERMINATIA
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Reproducerea asexuata la plante• se poate realiza prin structuri specializate(spori) sau prin organe
vegetative.
• La multe plante se poate forma un organism nou pe cale vegetativa,adica pornindu-se de la un organ sau de la un fragment de organ.
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Lucrari :
• Butasirea: • Marcotajul:
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ALTOIREA SI MICROBUTASIREA
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REPRODUCEREA SEXUATA LA ANGIOSPERME
• \
• STRUCTURA FLORII LA ANGIOSPERME:sepale,petale stamine,carpele.
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Elementele florale
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Tipuri de Carpele
• Carpele formeaza partea femeiasca a plantei, gineceul.
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PETALELE-FORMEAZA COROLA.CALICIUL SI COROLA
FORMEAZA INVELISURILE FLORII ,PARTEA EI ASEXUATA.
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SEPALE
• FORMEAZA CALICIUL.DE REGULA SUNT VERZI DAR POT FII SI COLORATE(CA LA IRIS)
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STAMINE
• FORMEAZA PARTEA BARBATEASCA A FLORII
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FUNCTIILE FLORII
• Formarea graunciorului de polen:in antera incepe cu meioza
• Formarea sacului embrionar:are loc in interiorul ovulului.O celula se divide prin meioza.
• Polenizarea:transportul polenului pana la stigmat.
• Formarea tubului polinic:are loc dupa ce gruncioarele au ajuns la stigmat.
• Fecundatia:se produce in sacul embrionar
• Formarea semintelor si fructelor:incepe dupa fecundatie.
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SAMANTA
• Radacinita
• Tulpinita
• Muguras
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FACTORII CARE INFLUENTEAZA GERMINATIA
• CONDITII INTERNE SI EXTERNE
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TIPURI DE GERMINATIE
• HIPOGEE:GRAU,PORUMB• EPIGEE:FASOLE
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Fotografii facute de grup
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GRUPUL:
• BOARTA ANDREEA
• COCOS CRISTINA
• GEORGESCU ELENA
• MITEA MADALINA
• STEFU GIORGIANA