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ascus
[ as-kuhs ]
noun
- the sac in ascomycetes in which the sexual spores are formed.
ascus
/ ˈæ²õ°ìÉ™²õ /
noun
- a saclike structure that produces (usually) eight ascospores during sexual reproduction in ascomycetous fungi such as yeasts and mildews
ascus
/ ă²õ′°ìÉ™²õ /
, Plural asci ă²õ′ī′,-°ìī′
- A membranous, often club-shaped structure inside which ascospores are formed through sexual reproduction in species of the fungi known as ascomycetes. The ascus is unique to ascomycetes and distinguishes them from other kinds of fungi. Asci are formed when two hyphae that are sexually compatible conjugate. Each ascus typically develops eight ascospores. Asci swell at maturity until they burst, shooting the ascospores into the air.
˜yÐÄvlog History and Origins
Origin of ascus1
˜yÐÄvlog History and Origins
Origin of ascus1
Example Sentences
Many ascomycetes produce their asci in cups, and in the case of the beech orange, the cups are the orange dimples of the golf ball.
That is, inside the ascus, a diploid fungal nucleus undergoes meiosis — or sexual, reductive cell division — to produce ascospores.
The conclusion of the epitaph is perplexing: it states that her husband dedicated it to her and her son's memory—under "the axe"—"Sub asci� dedicavit."
The ascus is thus one of the most sharply characterized structures among the fungi.
Exoascine�, a family of parasitic ascomycetous Fungi, distinguished by the absence of any definite fruit-body, the asci being produced in a layer on the surface of the host.
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