fungi - mt. san antonio collegeinstruction2.mtsac.edu/mcooper/biology 2/biology 2/exam...
TRANSCRIPT
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Fungi
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Fungi
First fungi were
probably flagellated.
– First fossils – 480
million years ago
(Ordovician Period)
– Molecular Clock
suggests 1 billion
years ago
(Precambrian).
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General Characteristics
Primarily
terrestrial
Filamentous
– hyphae
coenocytic
septate
– mycelium
– haustoria
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Fungal Hyphae
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General Characteristics(animal-like)
Heterotrophic
– absorption
(saprobes)
– parasitic
– mutualistic
Cell Wall: Chitin
Store sugar as
glycogen
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Fungal Reproduction
Asexual
–haploid spores (conidia/sporangia)
Sexual
–plasmogamy (dikaryon)
–karyogamy (diploid)
–Syngamy (diploid)
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Fungal Classification
Chytrids
Nuclerariids
Zygomycetes
Fungi
Opisthokonts Glomeromycetes
Choanoflagellates
Ascomycetes
Animals
Basidiomycetes
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Fungal Classification
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Division: Chytrids
Have flagella
Coenocytic hyphae or unicellular
Cell wall: chitin
Saprobes or parasites
May be most primitive fungi
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Division: Zygomycetes
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Division: Zygomycetes
Coenocytic Fungi
Mostly terrestrial (live
on decaying material
Example: Rhizopus
(Black bread mold)
Uses: birth control pills,
meat tenderizers,
margarine coloring
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Division: Glomeromycetes
Arbuscular mycorrhizae
– Coenocytic Fungi
– Mutualistic - associated
with plant roots
– increases surface area
for the absorption of
water and nutrients
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Division: Ascomycetes
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Divison: Ascomycetes
Septate fungi (sac
fungi)
Saprobes, mutualistic
Examples: Dutch Elm
Disease, yeasts,
truffles, some molds
Uses: pathogens, food,
cooking
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Division: Ascomycetes(Deuteromycota)
Imperfect fungi (no sexual cycle)
Examples: Penicillium, Aspergillus, Predatory fungi
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Division: Basidiomycetes
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Division: Basidiomycetes
Septate Fungi (Club
fungi)
Saprobes, parasites,
mutualistic
Examples: mushrooms,
toadstools, puffballs,
shelf fungi, rusts, smuts
Uses: Food
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Division: Basidiomycetes
Fairy Rings
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Lichen Mutualistic -
association with a
green algae or
cyanobacteria
and an
ascomycetes or
basidiomycetes
Pioneer
organisms
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Microsporidia Are they Fungi?
– Parasitic
Loss of organelles
Tiny organelles
derived from
mitochondria
– Cause disease in
people with immune
deficiency
– Used as pest control
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Ecological Impacts
Decomposers
Pathogens
Food Production