Zygospores are sexually produced, thick-walled spores formed by fungi in the phylum Zygomycota during sexual reproduction.

Zygospores

The life cycle of zygomycetes involves an asexual phase where mycelia produce haploid spores via mitosis that germinate into new mycelia, and a sexual phase where adjacent $$+$$ and $$-$$ mating types form gametangia that fuse via plasmogamy to create a zygosporangium. After karyogamy fuses the nuclei into a diploid zygote, it undergoes meiosis, and a sporangium grows to release new haploid spores.

Zygomycete Life Cycle

Rhizopus stolonifer is a species of zygomycete fungus that acts as a common bread mold and serves as a crop pathogen causing rice seedling blight.

Rhizopus stolonifer

Mucor is a genus of zygomycete fungi capable of causing necrotizing infections in humans, though most species are unable to tolerate mammalian body temperatures.

Mucor

Zygomycota is a phylum of fungi, mostly saprophytic, characterized by coenocytic hyphae and haploid nuclei. They reproduce asexually using sporangiospores and sexually using thick-walled zygospores formed by the fusion of reproductive cells from two individuals.

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While not all fungi cause illness, medically important species exist in four major fungal groups: Zygomycota, Ascomycota, Basidiomycota, and Microsporidia.

Pathogenic Fungal Groups

Coenocytic hyphae, also known as nonseptate hyphae, are fungal filaments that lack internal cell walls and cell membranes, resulting in continuous, multi-nucleated strands.

Coenocytic (Nonseptate) Hyphae

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Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

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Ascomycota is a phylum of fungi characterized by septate hyphae and cup-shaped fruiting bodies called ascocarps. They include edible species (mushrooms, morels, and truffles), food spoilage agents (bread molds and plant pathogens), and human pathogens, and reproduce using asexual conidia or sexual ascospores.

Ascomycota

Zygomycota

Basidiomycota (basidiomycetes) are a phylum of fungi characterized by club-shaped structures called basidia that produce basidiospores within fruiting bodies called basidiocarps. They play important ecological roles as decomposers, serve as food, and include mushrooms, rusts, stinkhorns, and puffballs.

Basidiomycota 

Microsporidia are unicellular fungi that function as obligate intracellular parasites, lacking mitochondria, peroxisomes, and centrioles, and are known to cause microsporidiosis.

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