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The fungi Saccharomyces produces ascospores when grown on V-8 medium, acetate ascospore agar, or Gorodkowa medium. These ascospores are globose and located in asci. Each ascus contains one to four ascospores. The asci do not rupture at maturity. Ascospores are stained with Kinyoun stain and ascospore stain.
The asci are globose, deliquescent, and scattered throughout the interior cavity i.e. as in Eurotium or arising in tufts from the basal region of ascocarps as in Erysiphe. In this case the ascocarp is round with the hymenium enclosed, so the spores do not automatically get released, and fungi with cleistothecia have had to develop new ...
Pisorisporium genera usually have an ascomata (the asci-bearing fruiting body) which is non-stromatic (not encased in the stroma), immersed, gradually erumpent (bursting through a surface) to superficial and solitary or in small groups or rows. It is also papillate (has a small, elongated protuberance on the surface) or with a short beak.
The paraphyses are abundant, hyaline (transparent or glass-like), persistent. The asci are 8-spored, unitunicate, pedicellate, persistent, with a J+ or J−, apical ring. Ascospores hyaline, multi-septate, often guttulate, lacking any mucilaginous sheath or appendages. The asexual morph was undetermined (as of March 2021). [10]
Apothecia: The asci are in a bowl shaped ascoma (apothecium). These are sometimes called the "cup fungi". Pseudothecia: Asci with two layers, produced in pseudothecia that look like perithecia. The ascospores are arranged irregularly. [21] The sexual structures are formed in the fruiting layer of the ascocarp, the hymenium. At one end of ...
P. capsellae is an ascomycete, meaning it produces ascospores housed in asci as means of sexual reproduction. Sexual structures are found in the sexual stage of this fungus, which has been classified as Mycosphaerella capsellae. The ascocarp of M. capsellae is a cleistothecium, meaning asci are shielded from the environment prior to ascospore ...
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Randomly arranged ascospores that set in the upper area of asci would be discharged through operculum at the asci tip. [9] The ultrastructure of ascospores of A. nigricans was investigated to have a deeper understanding of the formation of wall layers and ornamentation of ascospores. The invagination of the plasma membrane of ascus generates ...