A Seiva de Uma Juventude: intelectualidade, juventude e militância ...
Conducao de seiva
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Transcript of Conducao de seiva
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Xilema (seiva-bruta)
Floema (Seiva elaborada)
Vasos condutores de seiva:os vasos sanguíneos das plantas.
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H2O e sais minerais
Açúcares
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Teoria de Dixon
Tensão - coesão
Transpiração(vapor)
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Pressão positiva da raiz
Água
Solo úmido
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Gutação (líquida)
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Transpiração: estômatos
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O anelamento ou anel de Malpighi
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O desenvolvimento de um fruto depende das substânciasproduzidas na fotossíntese, que chegam até ele transportadaspelo floema, De um ramo de pessegueiro, retirou-se um anel dacasca (anel de Malpighi), conforme mostra o esquema.
Responda.
a) O que deve acontecer com os pêssegos situados no galho, acima do anel de Malpighi, em relação ao tamanho das frutas e ao teor de açúcar?b) Justifique sua resposta.