Unit 2 L fungi
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| For major phylum of fungi | chytridiomycota, zygomycota, ascomycota
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| Chytridiomycota | chytrids, most ancient, parasites, has flagella but are non fungal characteristic, motile spores
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| zygomycota | bread molts
Most are saprophytic and their vegetative hyphae lack septa
common genus is rhizopus
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| What is the modified hyphae of a zygomycota called | rhizoids
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| Stolons | connecting hyphae and sporangiophores (asexual reproductive)
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| Sporangiophores | upright hyphal filaments supporting asexually repoducing sporangia
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| What is within a sporangium | haploid nuclei become spores and are released to the environment when the sporangium matures and break open
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| Rhizopus | black bread mold and is isogamous + or -
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| sexual reproudction in zygomycota | Hyphae of each strain touch each other (gametangia appears as swelling)
The wall between the gametangia break down and cells fuse (plasmogamy)
fusion of nuclei karyogamy and occurs in the zygosporangium.
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| What happens after the zygosporangium forms | the zygotes undergo meiosis. one or more of resulting sopres soon germinates.
The hyphae of the germinating cells break out of the zygosporangium produce a sporangiophore via mitosis and form spores asexually.
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| In what structure is the dakr pigment of rhizopus concentrated | sporangia
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| Is the rhizopus reproducing sexually as well as asexually in the same petri dish | yes, because sporangia as well as zygospores are visible
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| Sac fungi | ascomycota, yeast molds morels and truffles.
Reproduce asexually by formed spores called conidia. A modified hyphae called conidiophores partition nuclei in longitudinal chains of breadlike conidia. ea. contains 1+ nuclei. Conidia -> rhizopus.
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lilram