anglais)

micropyle [GB ˈmʌɪkrə(ʊ)pʌɪl, Am ˈmaɪkrəˌpaɪl] SUBST

micropyle ZOOL, BOT

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micropilo ZOOL, BOT

micropyle

anglais

He describes the standard arrangement in angiospermsthe nucellus joined by the chalaza to the integuments, which surround the nucellus except at the micropyle, through which the pollen tubes enter. en.wikipedia.org

The micropyle opening allows pollen to enter the ovule for fertilization. en.wikipedia.org

Other seed appendages include the raphe (a ridge), wings, caruncles (a soft spongy outgrowth from the outer integument in the vicinity of the micropyle), spines, or tubercles. en.wikipedia.org

The top of the egg is depressed and forms a small central cavity called micropyle through which the egg is fertilised. en.wikipedia.org

Three cells die and one that is most distant from the micropyle develops into the megaspore. en.wikipedia.org

Other water gap structures include carpellary micropyle, bixoid chalazal plug, imbibition lid and the suberised stopper. en.wikipedia.org

The synergids function in the attraction and guidance of the pollen tube to the megagametophyte through the micropyle. en.wikipedia.org

The integuments do not enclose the nucellus completely but retain an opening at the apex referred to as the micropyle. en.wikipedia.org

Located opposite from the micropyle is the chalaza where the nucellus is joined to the integuments. en.wikipedia.org

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anglais