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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.
An apothecium (plural: apothecia) is a wide, open, saucer-shaped or cup-shaped fruit body. It is sessile and fleshy. The structure of the apothecium chiefly consists of three parts: hymenium (upper concave surface), hypothecium, and excipulum (the "foot"). The asci are present in the hymenium layer. The asci are freely exposed at maturity.
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 ...
The asci (spore-bearing structures) are formed with croziers; they are broadly club-shaped with a stalk, containing eight spores that are often arranged in two rows. At maturity, the asci release the ascospores in a powdery mass atop the capitulum.
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 ...
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 ...
Banksiamyces species have asci that are cylindrical to club-shaped, and contain a plug at their extreme tips that will absorb color when stained with iodine. The ascospores may be arranged in one or two rows (uniseriate and biseriate, respectively), or rarely, irregular. The ascospores are ellipsoid, translucent, have a slight curve and may be ...
Microscopic image of Sporormiella sexual morph a) single ascospore cell b) single four celled ascospore c) pseudothecia [14]. In Sporormiella, the sexual stage (easiest to observe) consists of small, dark brown, and glabrous (smooth and without ornamentation) to hairy pseudothesia that are unilocular (single cavity) and contain bitunicate asci. [7]