produce ascospores

Listing 11 - 20 from 22 for produce ascospores

Iron Mountain
... , each bearing eight ascospores. This reproductive structure is produced by the fungal symbiont (mycobiont) of the lichen. Nonlichenized fungi (without the algal symbiont) in the class Ascomycetes also produce cup-shaped apothecia ...
waynesword.palomar.edu

Palomar Mtn. Lichens
... and also occur in Europe (British Isles), Africa and South America. Many species produce microscopic soredia (clusters of algal cells intertwined with fungal hyphae). The granular soredia ... to convex apothecia without thalline rim; apothecia very small; ascus clavate with 8 colorless ascospores; appears after winter/spring rains with liverworts & mosses; unlike other crustose saxicolous Lecidea ( ...
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Laboratory Exercises in Plant Pathology - Identification of Powdery Mildew Fungi
... by N. Shishkoff) At the end of the growing season, powdery mildew fungi produce sexual spores, known as ascospores, in a sac-like ascus (pl. asci) enclosed in a fruiting body ... and chasmothecia on leaf surface. (Courtesy W. Gärtel) Ruptured chasmothecium showing several asci containing ascospores. Erysiphe (Section Uncinula sp.) (Courtesy B. Kendrick) The taxonomy of powdery mildew fungi (order ...
www.apsnet.org

APSnet Feature - Return of an Old Problem:Fusarium Head Blight of Small Grains
... Where G. zeae is the principal cause of FHB, ascospores are believed to be the principal primary inoculum in nature; however, both ascospores and conidiospores are effective as inoculum (33). Even if ... the relationship between temperature, moisture and FHB (1). It takes large differences in inoculum to produce measurable changes in FHB; one study found that a10-fold increase in inoculum caused only ...
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gloss
... in which fusion of compatible nuclei and reduction division usually occurs, containing usually eight ascospores, the sexual spores of the Ascomycotina. (go to example) Aseptate - Without crosswalls Asexual - ... spores. G (top) Gametangium (Gametangia) - A structure containing gametes, or nuclei that fuse and produce sexual spores. Gamete - A male or female reproductive cell, or the nuclei within ...
www.cals.ncsu.edu

powdery mildews
... (specialized hyphal tips that penetrate the host epidermal cells) and produce conidia (pictured below on the left) on the host surface and ascospores in a closed ascocarp (a cleistothecium, pictured below, right ...
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OD18 - Dutch Elm Disease
... bodies of the fungus are produced from the walls of the galleries. These fruiting bodies produce masses of sticky spores that adhere to the surface of the adult beetles as they ... elm bark beetles; (middle left) conidia (asexual stage) of O. ulmi; (middle right) perithecia and ascospores (sexual stage); (right) root graft. (Photographs courtesy of L. Grand) Control The most effective means ...
www.ces.ncsu.edu

Ascomycota
... are ascospores. These are contained in a sac called an ascus, and are produced following meiosis and usually a mitotic division. Haploid mycelium of two mating types occur. These will produce ... and meiosis to produce 4 ascospores per ascus. 2. Schizosaccharomyces This form is haploid, except for the brief time following karyogamy and prior to meiosis. In this group, 8 ascospores are formed. 3 ...
www.cs.cuc.edu

Timber Rot of Tomato
... , moist soil conditions the sclerotia produce mycelium that infects stems near the soil surface. Sclerotia also produce spore-producing structures, called apothecia, that release ascospores in the spring. Ascospores are wind-disseminated and can ...
www.ext.vt.edu

Plant Pathology Fact Sheets -- Fruit Pathology
... and produce spores (ascospores) that are discharged into air currents and carried to developing apple buds. The fruiting bodies in the fallen leaves must be wet for the spores to discharge. The ascospores ... fall (second cover period). If scab infection can be prevented during the time all the ascospores are discharged from the fruiting bodies in the fallen leaves, the disease cycle is broken ...
www.ppath.cas.psu.edu

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