Fungi

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Fungi
- Eukartoytic multicellular
- Lack photosynthesis
- Get nutrients and water from absorption
- Classified based on differences in reproductive structure
Saprobes

Absorbs nutrients from non living
Parasitic

Absorbs nutrients from living host
Hyphae
- long strand of cells that are attached end to end
- May make large networks
Mycelium

Fungal mat
Zygoycetes

Reproduction occurs with male and female structure both on separate hyphae
Plasmagamy

Cytoplasm of male and female fuse
Gametangia
- Reproductive parts hyphae contain several haploid nuclei
- Cytoplasm of male ad female fuse, followed by fusion of haploid nuclei
- Ex: mycorrhizae
Karyogamy
- Fusion of haploid nuclei
- Only happens when conditions are favorable
Ascomycetes
- Also known as sac fungi
- Female gametangia receive haploid nuclei from male, female start to grown rapidly into hyphea adn make asci
Asci

closed compartments where karyogamy takes place
Ascosphores

Asci that divide by mitosis
Basidiomycetes
- Mushrooms
- Basiocarps- Large umbrella shape reproductive bodies
- Asexual spores under basicocarps
- Hypae stretched undergrond
- Haploid hyphae meet spores released from mushroom
Dikaryotic Hyphae

Having nuclei from two parents, grow into new hyphea
Molds

Are rapid growing fungi that reproduce only asexually
Yeasts
- Are unicellular fungi that inhibit moist environments
- Reproduce vis budding
Lichens
- Combination of fungus and algae living together in one organism
- Algal cells make sugar and nutrients for themselves while the fungus absorbs water and house algae
- First colonizers of landscapes after fire and extremely hardy but sensitive to man made pollution
- Reproductive sexually and asexually using spires and alternation of generations

Author

rica_ross

235264

Card Set

Fungi

Description

Biology GRE

Updated

9/17/2013, 2:43:42 AM

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