ascus

ascus
/as"keuhs/, n., pl. asci /as"uy, -kuy, -kee/. Mycol.
the sac in ascomycetes in which the sexual spores are formed.
[1820-30; < NL < Gk askós bag, sac]

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▪ fungal reproduction
plural  asci,  

      a saclike structure produced by fungi of the phylum Ascomycota (sac fungi) in which sexually produced spores (ascospores), usually four or eight in number, are formed. Asci may arise from the fungal mycelium (the filaments, or hyphae, constituting the organism) without a distinct fruiting structure, as in the leaf curl fungi; it may arise within a fruiting structure (ascocarp) that may be exposed, as in the molds and powdery mildew fungi; or it may be imbedded in a compact structure (stroma), as in the ergot and black knot fungi. In the case of yeasts, a single cell converts to an ascus.

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  • Ascus — von Hypocrea virens mit acht doppelzelligen Ascosporen Der Ascus (Plural: Asci, übersetzt: Schlauch) ist das charakteristische und (für den wissenschaftlichen Namen Ascomycota) namensgebende Fortpflanzungsorgan der Schlauchpilze. Es handelt sich… …   Deutsch Wikipedia

  • Ascus — Saltar a navegación, búsqueda El temino Ascus puede hacer referencia a: Ascus (micología) ASCUS (medicina) es un acrónimo utilizado en medicina Obtenido de Ascus Categoría: Wikipedia:Desambiguación …   Wikipedia Español

  • Ascus — As cus, n.; pl. Asci. [NL., fr. Gr. ? a bladder.] (Bot.) A small membranous bladder or tube in which are inclosed the seedlike reproductive particles or sporules of lichens and certain fungi. [1913 Webster] …   The Collaborative International Dictionary of English

  • ascus — ascus. См. сумка. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Ascus — (v. gr., Sporenschlauch, Schlauchzelle), eine erweiterte u. oft auch verlängerte Zelle, welche bei den Flechten u. Pilzen die Sporen einschließt. Ascigĕrus, sporenschlauchführend …   Pierer's Universal-Lexikon

  • Ascus — (lat.), s. Sporenschlauch …   Meyers Großes Konversations-Lexikon

  • Ascus — (grch. askós), Schlauchzelle, Mehrzahl asci, s. Askomyzeten …   Kleines Konversations-Lexikon

  • Ascus — Ascus, Meiosporangium der ⇒ Ascomycetes; entsteht aus dem befruchteten Ascogon, dem f Gametangium. In ihm ordnen sich m und f Kerne zu Kernpaaren an, die sich synchron teilen. Während sich bei den Hefen die Zygote direkt zum A. entwickelt,… …   Deutsch wörterbuch der biologie

  • ascus — sac in certain fungi, 1830, Mod.L., from Gk. askos leather bag, wine skin, of unknown origin …   Etymology dictionary

  • ascus — [as′kəs] n. pl. asci [as′ī΄] [ModL < Gr askos: see ASCO ] in ascomycetous fungi, a sac in which spores (usually eight) are produced and meiosis occurs …   English World dictionary

  • Ascus — An ascus (plural asci) is the sexual spore bearing cell produced in ascomycete fungi. On average, asci normally contain 8 ascospores, produced by a meiotic cell division followed, in most species, by a mitotic cell division. However, asci in some …   Wikipedia

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