Fungi within the phylum Zygomycota are known as zygomycetes. The zygomycetes are terrestrial. They’re usually saprotrophs but there are several parasites. The hyphae are coenocytic (theyn lack septa). Septa are located just into the reproductive structures.
Reproduction in Zygomycota
Fusion of two hyphae causes the forming of a zygosporangium, a thick-walled structure that is effective at surviving ecological extremes. Before karyogamy, the zygosporangium contains numerous haploid nuclei. after karyogamy, it includes numerous diploid nuclei.
Rhizopus (Bread Mold)
Figure 2. Rhizopus* sporangia
Asexual reproduction involves mycelia sporangia that is producing produce haploid spores by mitosis. The spores create brand new mycelia.
Figure 3. Rhizopus* zygotes
Whenever ecological conditions deteriorate, intimate reproduction may possibly occur. Hyphae from other mating kinds create structures that have a few nuclei that are haploid. Fusion of two among these structures from reverse mating types leads to a zygosporangium that is heterokaryotic. A thick wall surface develops that functions to guard the zygospore until ecological conditions become favorable. Whenever conditions are favorable, nuclear fusion (karyogamy) happens in the zygosporangium creating diploid nuclei. This really is accompanied by meiosis. The zygosporangium then germinates to make a sporangium which releases haploid spores.
Observe Rhizopus (bread mildew) growing for a culture meal. Use a dissecting microscope to see information on the hyphae and sporangia. Will there be any pr f of intimate reproduction?
Phylum Ascomycota (Sac Fungi)
Examples Yeasts, molds, morels, truffles