ASCUS Meaning and
Definition
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An "ascus" is a reproductive structure found in certain fungi, particularly in the class Ascomycetes, which are commonly known as sac fungi. The term "ascus" is of Latin origin, meaning "sac." It is characterized by its distinctive appearance and role in sexual reproduction of these fungi.
An ascus is a sac-like structure that contains reproductive cells called ascospores. It is usually elongated and contains eight ascospores, although the number may vary depending on the species. Ascospores are produced through the process of meiosis, which helps in genetic recombination.
The ascus is formed within a specific structure called an ascocarp or ascogenous hyphae, which is visible to the naked eye as fruiting bodies. These fruiting bodies can vary in shape, size, and color depending on the species and are crucial for the dispersal of ascospores.
The ascus is considered a key feature in the identification and classification of sac fungi, as its characteristics, such as size, shape, and arrangement of ascospores, can aid in species identification. Scientists use these features, along with other microscopic and biochemical tests, to classify fungal species accurately.
The study of asci and their characteristics is important not only for taxonomical purposes but also for understanding the life cycle, reproductive strategies, and evolutionary relationships within the fungus kingdom.
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The elongated spore-containing cell of moulds, lichens, and other ascomycetes.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
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In bot., a membranous tubular cell, of which several are sunk in the substance of lichens and fungi containing their sporules.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
Common Misspellings for ASCUS
Etymology of ASCUS
The word ascus originates from the Ancient Greek word askos, which means skin or bag. It also refers to a leather bag or wine skin in the Greek language. The term ascus specifically pertains to the sac-shaped reproductive structure found in certain fungi, such as Ascomycetes. The morphology of the reproductive structure resembles a bag or pouch, hence the etymological link to the Greek word askos.
Similar spelling words for ASCUS
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