fungus p.b.&j. tomato popcorn wheat bread cake
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FungusFungus
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P.B.&J.
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Tomato
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Popcorn
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Wheat Bread
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Cake
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Oral ThrushOral Thrush
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Skin FungusSkin Fungus
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Ringworm
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Advanced Athlete’s Foot
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Ringworm - Foot of 77 year old Woman
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ParacoccidioidomycosiParacoccidioidomycosis s
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What is Fungus?What is Fungus?
Have cell walls (Chitin)Have cell walls (Chitin) EukaryoticEukaryotic Unicellular (yeast)Unicellular (yeast) Most MulticellularMost Multicellular HeterotrophicHeterotrophic
– (Extracellular Digestion)(Extracellular Digestion) Absorptive heterotrophAbsorptive heterotroph
Decomposers, Parasites Decomposers, Parasites or Mutualistsor Mutualists
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Fungal StructureFungal Structure
HyphaeHyphae– Threadlike filaments that develop Threadlike filaments that develop
from sporesfrom sporesa.a. AnchorAnchor
b.b. ReproductiveReproductive
c.c. Invade Energy SourceInvade Energy Source
MyceliumMycelium– Network of HyphaeNetwork of Hyphae
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FeedingFeeding
Extracellular DigestionExtracellular Digestion• Food is digested outside of cellFood is digested outside of cell• Digested products then AbsorbedDigested products then Absorbed
3 Types of Feeding3 Types of Feeding• SaprophytesSaprophytes• MutualistsMutualists• ParasitesParasites
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SaprophytesSaprophytes DecomposersDecomposers
– Dead organic materialDead organic material
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MutualistsMutualists Form symbiotic relationship with Form symbiotic relationship with
another organismanother organismExample: Mycorrhiza Mycorrhiza
– Tree RootsTree Roots– Give: Water Give: Water Absorption, Absorption, Make minerals Make minerals availableavailable– Get : “Food” Get : “Food” from Treefrom Tree
90% of all trees 90% of all trees depend on Mycorrhizadepend on Mycorrhiza
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ParasiticParasitic
Absorb nutrients from the cells of Absorb nutrients from the cells of hosthost
Can produce special hyphae Can produce special hyphae known as known as HaustoriaHaustoria– Penetrate host cell and absorb Penetrate host cell and absorb
nutrients directlynutrients directly
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Butt Rot
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ReproductionReproduction
FragmentationFragmentation– Hyphae that get broken off to form new Hyphae that get broken off to form new
MyceliaMycelia BuddingBudding
– Asexual reproductionAsexual reproduction Mitosis occurs and a new individual pinches off Mitosis occurs and a new individual pinches off
from parentfrom parent
Spores (Most produce spores)Spores (Most produce spores)– Reproductive cell that can develop into Reproductive cell that can develop into
new organismnew organism
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Spores Cont.Spores Cont. Hyphae emerge from sporeHyphae emerge from spore
SporangiumSporangium– Specialized hyphae that grow away from Specialized hyphae that grow away from
myceliummycelium– Structure containing sporesStructure containing spores
Over 1 trillion spores can be released Over 1 trillion spores can be released from a single sporangiumfrom a single sporangium– Spores can be dispersed by way of: wind, Spores can be dispersed by way of: wind,
animals & wateranimals & water
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