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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. [1]
The cup of the apothecium is lined with asci, in which the ascospores are contained. When the ascospores are released from the asci, they are carried by the wind until they land on a suitable host. The ascospores of S. sclerotiorum infect aboveground plant host tissue [14] and begin to invade the host's tissues via mycelium, causing infection.
It is white on the inside, with a blackened dotted area all around. This blackened surrounding area is made up of tiny structures called perithecia. The perithecia hold a layer of asci which contain the ascospores. The asci elongate into the ostiole, and discharge the ascospores outward. The spore distribution is a lengthy process, sometimes ...
Stipes are slender and cylindrical, with a surface texture ranging from smooth to squamulose (covered with tiny scales), or, in some instances, covered with tufts of tiny hairs. The asci are club-shaped, inoperculate (without a cap or lid), and usually contain eight ascospores. These spores are club-shaped to somewhat cylindrical to somewhat ...
The asci (filamentous structures in which the ascospores develop) are cylindrical with gradually tapering bases, eight-spored, and measure 240–280 by 12–15 μm. The ascospores have ellipsoidal to roughly cylindrical shapes, usually with blunt ends, and measure 19–22 by 10–12 μm.