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Hidatódio

Gutação numa folha de morangueiro
Gutação nas folhas de uma roseira

Hidatódio[1] ou hidátodo[2] (do grego transliterado Hydor, hydatos, "água", e odos, "caminho"[1]) é a estrutura secretora composta por estômatos aquíferos nas margens e extremidades das folhas de algumas plantas, perto de terminações de pequenas nervuras. Se abre para o exterior através de poros na epiderme, permitindo, através da gutação, que água saia do interior da folha à superfície foliar. A água pode ser liberada de forma passiva ou por pressão radicular elevada.[2]

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Hidatódio
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