ovários e frutos 2012 aula
DESCRIPTION
reprodução de angiospermas. classificação de ovários, flores.TRANSCRIPT
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FRUTOS
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Quanto a fusão ou não dos carpelos
Gamocarpelar
Dialicarpelar
Quanto ao número de lojas
Unilocular
Plurilocular
Quanto a posição do ovário
Súpero
ínfero
Classificação dos ovários
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3 carpelos apocárpicos
dialicarpelar
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3 carpelos sincárpicos
gamocarpelar
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Ovário tricarpelar e gamocarpelar
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Esquema de soldadura do estigma
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Ovário composto
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PLACENTAÇÃO
Parietal: os óvulos se prendem na parede do ovário, com seus pedicelos voltados para a periferia
axial: os óvulos se prendem no eixo mediano axial do ovário
Central: os óvulos se fixam numa dilatação de um pedicelo que nasce no fundo do ovário
Difusa: os óvulos se distribuem por toda a superfície do óvário
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Placentação parietal
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Placentação axilar
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Placentação central ou livre
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Óvulo
Tegumento: duas membranas
orifício (micrópila) = o exterior em contato com a nucela
e nucela: toda massa celular envolvida pelo tegumento
Saco embrionário com várias células:
3 células: 2 laterais (sinérgidas) e oosfera
núcleo secundário do saco embrionário ( no meio)
Antípodas (polo oposto)
externa: primina
interna: secundina
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REFERENCIAS GONCALVES, Eduardo Gomes; LORENZI, Harri. Morfologia vegetal: organografia e dicionário ilustrado de morfologia das plantas vasculares. Nova Odessa: Instituto Plantarum de Estudos da Flora, 2007.
OLIVEIRA, Fernando de; AKISUE, Gokithi. Fundamentos de farmacobotânica e de morfologia vegetal. 3. ed. São Paulo: Atheneu, 2009. 228 p. RAVEN, Peter H; EICHHORN, Susan E; EVERT, Ray F. Biologia vegetal. Rio de Janeiro: Guanabara Koogan, 19--, 20--.
CUTTER, E.G. Anatomia vegetal (Partes I E Parte II). São Paulo: Roca, 20--. ESAU, K. Anatomia das Plantas com Sementes. São Paulo: Edgard Blucher Ltda, 199-, 20-- . FERRI, Mário Guimarães. Botânica: morfologia interna das plantas (anatomia). São Paulo: Nobel, 19--.. FERRI, Mário Guimarães. Botânica: morfologia externa das plantas (organografia). São Paulo: Nobel, 19--