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This Review contains major "Ascospores"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- Ascospores are spores (usually eight) that are contained in sacs (asci), and basidiospores (usually four) are contained in clublike structures (basidia).
- Ascospores are disseminated by wind, while the virus containing conidia are not airborne, and have to rely upon animal or water (rain) vectors for dispersal.
- Ascospores are nonmotile, usually single celled, but not infrequently may be septate (lacking a septum), and in some cases septate in multiple planes.
- Ascospores are a general category of spores that have been produced by means of sexual reproduction (in a sack-like structure called an ascus).
- Ascospores are released from the ascoma and germinate to form a new haploid mycelium.
- It was ascertained microscopically that the majority of the perithecia had erupted, freeing the ascospores.
- One has to make sure that the asci observed contain eight ascospores, and have both colors of ascospores present (tan = dark and wild-type = light).
- These ascospores are never forcibly discharged, but they can be extruded in a dark, sticky mass or cirrhus.
- The asci and ascospores of morels.
- The unitunicate ascus sometimes has an operculum (a small lid), which opens to liberate the ascospores when the ascus is mature.
- The order Helotiales has inoperculate asci-- this means that their asci (which bear the ascospores) do not open by a hinged lid called an operculum.
- The ascospores either bud asexually or fuse with another cell to repeat the sexual process.
- These ascospores may fuse with adjoining nuclei and multiply through vegetative division or, as with certain yeasts, fuse with other ascospores.
- The mummified berries overwinter, then germinate to produce Monilinia apothecia that release the primary inoculum (ascospores) to start the cycle again.
- In addition to sequence analyses, mating experiments indicated that P. variotii is able to form ascomata and ascospores in culture in a heterothallic manner.
- Ascospores of P. lignicola possess a germ pore at each end, a feature not seen in ascospores of A. megaloascocarpa.
- In addition two new hepaticolous species of Nectria with unusual ascospores are proposed.
- However, on opening, 10% of these perithecia contained ascus rosettes with eight viable ascospores.
- Most of these (60%) harbored undifferentiated asci and no viable ascospores (Figure 4).
- An asterix indicates ascospores of species growing on Frullania dilatata.
- Under laboratory conditions, S. macrospora completes its life cycle within seven days and produces pear-shaped fruiting-bodies with asci and ascospores.
- For example, strain CBS 110431 was isolated from rye bread, where the production of heat-resistant ascospores is not a prerequisite for spoilage.
- Note that the 8 ascospores in the colour photomicrograph (left) are darkly pigmented and dictyosporous.
- Six days after induction, the control strain FGSCA26 had differentiated mature fruiting bodies: cleistothecia filled with ascospores.
- Mature fruiting bodies from most ascomycetes harbor 200 to 400 asci, which after meiosis and postmeiotic divisions contain eight ascospores each.
- Wherever gene recombination took place, black and tan ascospores were observed in the same ascus.
- Ostiolar openings are visible throughout the specimen but mature ascospores were found only in one region.
- This is the first record of the carpogenic germination of S. minor in Australia and demonstration of infectivity of the ascospores on sunflower.
- There are 8 globose, uniseriate ascospores.
- It produces both asexual spores (conidia) and sexual spores (ascospores).
- A globular to flask-shaped fruiting body that has an apical pore through which the spores (ascospores) are released.
- Numerous ascospores are situated within an ascus which is a sac-like structure.
- Cleistothecia harvested from either transformant contained numerous ascospores that were able to germinate when transferred to culture medium.
- Sexual ascospores are produced in a saclike structure called an ascus.
- Saccharomyces produces ascospores, especially when grown on V-8 medium, acetate ascospor agar, or Gorodkowa medium.
- Each ascus contains eight ascospores, produced by a meiotic cell division followed by a mitotic cell division.
- Asci of Morchella elata, containing ascospores In plants, microspores, and in some cases megaspores, are formed from all four products of meiosis.
- Table 2 shows the results for colonies and ascospores of C. globosum.
- Being the result of meiosis, an ascus usually contains eight ascospores but, in some species, the ascus contains only four, or two ascospores.
- Ascospores are formed within the ascus as a result of free cell formation or ascosporogenesis.
- Eight ascospores can be found lined up in a row in the asci; they form a single zygote, which is diploid.
- An ascus is typically club shaped and which forms internally 4 or 8 ascospores, usually in a row.
- If the ascospores arrangement has four black and tan ascospores in a row, then hybridization took place but no crossing over arose.
- The latter are called ascospores in contrast to the asexual conidiospores.
- Ascomycetes, such as baker's yeast, are popular for genetics research because the ascospores they produce in each ascus are the products of meiosis.
- Asci are tubular sacs containing the ascospores, which are the products of meiosis.
- Yeast, the unicellular fungi that has the charecteristics of cell, ascospores and colony has the ability to ferment sugars by the production of ethanol.
- The Ascomycota includes the higher fungi that reproduce sexually by the production of ascospores.
- Multipolar budding, production of ascospores, and fermentation profile aid in identification of Saccharomyces [ 531].
- In most ascomycota, the ascus becomes turgid at maturity and finally bursts, sending its ascospores explosively into the air.
- Like the Ascospores, levels of Basidiospores may be higher indoors than outdoors if there have been recent changes in outdoor weather conditions.
- Most Ascospores of health or IAQ importance are identified separately by their genus (e.g.
- Ascospores are the sexual spores produced by this genus.
- Members of the Ascomycotina produce asexual conidiospores and sexual ascospores in sac-shaped cells called asci.
- Eight ascospores typically are formed within the ascus, but this number may vary from one to over a thousand according to the species.
- In most ascomycetes, each ascus contains eight ascospores, but the number may vary from one to several hundred.
- While the number of ascospores per ascus in usually 8, 1, 2, 4, 6, as well as numerous ascospores per ascus are also known.
- The individual ascospores are extremely variable in size and shape.
- The upper ascus is older and shows also a brighter fluorescence than the ascus below, which is younger (compare the size of the ascospores).
- The ascospores are small, colorless or sometimes pigmented, round in face view, somewhat flattened in side view, and may be ornamented or flanged.
- Ascospores are colorless and formed eight per ascus.
- At maturation, the cleistothecium bursts and releases the asci, which are filled with ascospores.
- In a few cases, the ascospores can bud off conidia that may fill the asci (e.g.
- When the asci expand they rupture the chasmothecia wall, throwing the ascospores into the air.
- However, isolates of S. minor and S. sclerotiorum were proven to be homothallic ascomycetes, by self-fertility of all eight ascospores within an ascus.
- As the spores grow, fluid pressure builds up in the ascus until the operculum bursts open and the ascospores are blown out into the environment.
- The perfect state is characterized by the formation of a saclike cell (ascus) containing ascospores.
- Like P. variotii, this species also occurs in heat-processed products due to the formation of heat-resistant ascospores.
- Ascomycetes > Ascus
* Defining Feature
* Form Ascospores
* Fruiting Bodies
* Fruiting Body
* Haploid Ascospores
* Haploid Mycelium
* Mature Ascospores
* Meiotic Divisions
* Sac-Like Structure
* Sexual Reproduction
* Sexual Spores
* Sexual State
* Vegetative Cells
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