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Reproduction in Fungi

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1. Describe the structure of a multi-cellular fungus. Identify the vegetative and reproductive portions of the fungus.
2. Distinguish between sexual and asexual fungal spores. Give examples of each type of spore.
3. Describe the reproductive mechanisms of yeasts
4.What ace the imperfect fungi?
5. How do fungi digest their food? How does this differ from the way animals digest their food?
6. What are the specialized hyphae of parasitic fungi that penetrate the cells of hosts called?

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1. The plant body of multicellular fungi is a thaloid structure having cell wall made up of chitin.
Vegetative structure
Thalus bears filmentous structure called hyphae which together form mycelium.
The mycelium may be aseptate (Phycomycetes) or septate (Ascomycetes & Basidiomycetes).
Reproductive structure
At maturity mycelium forms reproductive structures. Fungi reproduces by any of three methods - vegetative, asexual & sexual. Vegetative reproduction occurs mostly by the fragmentation of the plant body. However, it reproduces asexually by the formation of spores like sporangia or conidia. Both are formed on a speacialised structure sporangiphore and conidiophore respectively. Sexual reproduction preceded by the formation of gametangia. Both ...

Solution Summary

The plant body of multicellular fungi is a thaloid structure having cell wall made up of chitin. Thalus bears filmentous structure called hyphae which together form mycelium. At maturity mycelium forms reproductive structures. Fungi reproduces by any of three methods - vegetative, asexual & sexual. Vegetative reproduction occurs mostly by the fragmentation of the plant body. However, it reproduces asexually by the formation of spores.

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FUNGI

Please answer the following questions on FUNGI (attached).

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LAB 15-A

1- Do the hyphae of zygomycetes contain cross walls (sept)?
2- How would you describe the hyphae of Zygomycetes?

LAB 15-B

1- Describe the hyphae of pezira
2- Are ascospores the result of asexual or sexual reproduction?

LAB 15-C

1- Describe the hyphae of basidiomycetes
2- Are basidiospores the result of asexual or sexual reproduction
3- In general terms, compare asci and basidia with respect to the roles of meiosis and mitosis in their development

LAB 15-D

1- Why are these fungi referred to as imperfect fungi?
2- Penicillium roqueforti (the blue mold that favors Roquefort and blue cheese) is an ascospore producing fungus. In what division would you place P. roqueforti ?

LAB-15-E

1- If both organisms are presumed to benefit, what type of symbiotic relationship exists in lichens between the fungus and the alga (or the cyanobacterium)?
2- How would your answer to question #1 be affected if you consider that the algae of some lichens can live alone, whereas the fungi of those lichens can not survive alone?
3- Why may the term controlled parasitism be a better description of therelationship between the fungus and alga (or cyanobacterium)?
4- Identify a-f as one of the following groups of fungi: Aygomycota, Basidiomycota, Ascomycota, or Deuteromycota.
a. reproduce sexually by asci
b. eukaryotic cells
c. zygospores
d. reproduce asexually by conidia
e. hyphae lack cross walls
f. four basidiospores per basidium
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