Au cours du processus de la germination, la gemmule se développe (après la radicule) et donne une tige feuillée au-dessus des deux cotylédons. Le premier entre-nœud donne le mésocotyle. Le deuxième entre-nœud donne l'épicotyle.
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gemmule — [ ʒemyl ] n. f. • 1808; lat. gemmula, dimin. de gemma → gemme ♦ Bot. Bourgeon de l embryon, partie sommitale de la plantule appelée à se développer en pousse feuillue. ⇒ plumule. ● gemmule nom féminin (latin gemmula, petite gemme) Bourgeon… … Encyclopédie Universelle
Gemmule — Gem mule, n. [L. gemmula, dim. of gemma: cf. F. gemmule. See {Gem}.] 1. (Bot.) (a) A little leaf bud, as the plumule between the cotyledons. (b) One of the buds of mosses. (c) One of the reproductive spores of alg[ae]. (d) An ovule. [1913… … The Collaborative International Dictionary of English
gemmule — [jem′yo͞ol΄] n. [Fr < L gemmula, dim. of gemma, a bud: see GEM] Biol. a bud of a moss or a reproductive body of an alga or of certain sponges; small gemma … English World dictionary
gemmule — n. small gemma. ♦ gemmulation, n. production of gemmule. ♦ gemmuliferous, a. bearing gemmules … Dictionary of difficult words
gemmule — n. an encysted embryonic cell cluster in sponges. Etymology: F gemmule or L gemmula little bud (as GEM) … Useful english dictionary
gemmule — noun Etymology: French, from Latin gemmula, diminutive of gemma Date: circa 1828 a small bud: a. a theoretical particle proposed in the theory of pangenesis that is shed by a somatic cell and contains all the information necessary to reproduce… … New Collegiate Dictionary
Gemmule — Gemmules are internal buds found in freshwater sponges and are the result of asexual reproduction, and resemble round, food filled balls. Gemmules have a protective coat composed of spicules and organic matter. They are resistant to desiccation… … Wikipedia
gemmule — n. [L. gemma, bud] 1. A bud like outgrowth that becomes an independent individual. 2. (PORIFERA) Composed of a mass of archaeocytes charged with reserves and enclosed in a non cellular protective envelope. 2. Historically a particle of heredity,… … Dictionary of invertebrate zoology
gemmule — /jem yoohl/, n. 1. Bot. gemma. 2. Zool. an asexually produced mass of cells that is capable of developing into an animal, as a freshwater sponge. 3. Evolution. one of the hypothetical living units conceived by Darwin in the theory of pangenesis… … Universalium
gemmule — noun A small gemma or bud of dormant embryonic cells produced by some freshwater sponges 1978 Patricia R. Bergquist, Sponges See Also: gemmulation … Wiktionary
