- Grain de pollen
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● Grain de pollen prothalle mâle des angiospermes.
Encyclopédie Universelle. 2012.
Grain de pollen
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Grain de pollen — Pollen Pollen de plusieurs plantes : tournesol (Helianthus annuus), volubilis (Ipomoea purpurea), Sidalcea malviflora, Lilium auratum, onagre (Oenothera fruticosa) et ricin commun (Ricinus communis) … Wikipédia en Français
POLLEN — L’étude du contenu vivant du pollen – relativement peu différencié et difficile à observer – est un peu éclipsée par celle de la membrane pollinique [cf. PALYNOLOGIE]. La fonction biologique fondamentale du pollen dans la reproduction sexuée des… … Encyclopédie Universelle
grain — [ grɛ̃ ] n. m. • v. 1160; lat. granum → graine I ♦ 1 ♦ Fruit comestible des graminées. Le grain des céréales est un caryopse. Grain de blé, de maïs, de mil, de riz, d orge. Ôter les grains d un épi. ⇒ égrener. Menuis. GRAIN D ORGE. Assemblage à… … Encyclopédie Universelle
Pollen — Pour les articles homonymes, voir Pollen (film) et Association pour la politique à l ENS. Pollen de plusieurs plantes : tournesol (Helianthus annuus), volubilis (Ipomoea … Wikipédia en Français
Pollen grain — Pollen Pol len, n. [L. pollen fine flour, fine dust; cf. Gr. ?] 1. Fine bran or flour. [Obs.] Bailey. [1913 Webster] 2. (Bot.) The fecundating dustlike cells of the anthers of flowers. See {Flower}, and Illust. of {Filament}. [1913 Webster]… … The Collaborative International Dictionary of English
Pollen — Pol len, n. [L. pollen fine flour, fine dust; cf. Gr. ?] 1. Fine bran or flour. [Obs.] Bailey. [1913 Webster] 2. (Bot.) The fecundating dustlike cells of the anthers of flowers. See {Flower}, and Illust. of {Filament}. [1913 Webster] {Pollen… … The Collaborative International Dictionary of English
Pollen mass — Pollen Pol len, n. [L. pollen fine flour, fine dust; cf. Gr. ?] 1. Fine bran or flour. [Obs.] Bailey. [1913 Webster] 2. (Bot.) The fecundating dustlike cells of the anthers of flowers. See {Flower}, and Illust. of {Filament}. [1913 Webster]… … The Collaborative International Dictionary of English
Pollen sac — Pollen Pol len, n. [L. pollen fine flour, fine dust; cf. Gr. ?] 1. Fine bran or flour. [Obs.] Bailey. [1913 Webster] 2. (Bot.) The fecundating dustlike cells of the anthers of flowers. See {Flower}, and Illust. of {Filament}. [1913 Webster]… … The Collaborative International Dictionary of English
Pollen tube — Pollen Pol len, n. [L. pollen fine flour, fine dust; cf. Gr. ?] 1. Fine bran or flour. [Obs.] Bailey. [1913 Webster] 2. (Bot.) The fecundating dustlike cells of the anthers of flowers. See {Flower}, and Illust. of {Filament}. [1913 Webster]… … The Collaborative International Dictionary of English
Grain — (gr[=a]n), n. [F. grain, L. granum, grain, seed, small kernel, small particle. See {Corn}, and cf. {Garner}, n., {Garnet}, {Gram} the chick pea, {Granule}, {Kernel.}] [1913 Webster] 1. A single small hard seed; a kernel, especially of those… … The Collaborative International Dictionary of English
