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Conidiogenesis corresponds to Embryology in animals and plants and can be divided into two fundamental forms of development: blastic conidiogenesis, where the spore is already evident before it separates from the conidiogenic hypha, and thallic conidiogenesis, during which a cross-wall forms and the newly created cell develops into a spore. The ...
Once mature the elastic ring briefly expands and lets the spores shoot out. This type appears both in apothecia and in perithecia; an example is the illustrated Hypomyces chrysospermus. Ascus of Saccharomyces cerevisiae containing a tetrad of four spores. A bitunicate ascus is enclosed in a double wall. This consists of a thin, brittle outer ...
Most entomopathogenic fungi in the Phylum Ascomycota infect and proliferate in the insect body in a parasitic phase before eventually killing the host. Upon the death of the host, these fungi have the ability to grow saprophytically in and on the insect cadaver and produce and release spores.
The spores range from white to cream to slightly yellow in deposit, although a spore print may be difficult to obtain given the shape of the fruit body. [4] The spores are formed in asci lining the pits—the ridges are sterile. [5] They are ellipsoidal, smooth, thin-walled, translucent , and measure 17.5–21.9 by 8.8–11.0 μm.
In the Ascomycota, spores develop within microscopic elongated, sac-like cells called asci, which typically contain eight spores in each ascus. The Discomycetes , which contain the cup, sponge, brain, and some club-like fungi, develop an exposed layer of asci, as on the inner surfaces of cup fungi or within the pits of morels .
Ascomycota life cycle and morphology The phylum Ascomycota , or sac fungus , is characterized by formation of meiotic spores called ascospores enclosed in a special sac called an ascus . The genetic components for sexual reproduction appear to be produced by all members of this group.
They have asexual form of reproduction, meaning that these fungi produce their spores asexually, in the process called sporogenesis. There are about 25,000 species that have been classified in the deuteromycota and many are basidiomycota or ascomycota anamorphs.
The genus name, meaning "nerve spore" refers to the characteristic striations on the spores that resemble axons. The best known species in this genus is Neurospora crassa, a common model organism in biology. Neurospora intermedia var. oncomensis is believed to be the only mold belonging to Neurospora which is used in food production (to make ...