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FungiThe decomposers
Ecological Importance
DecompositionSymbiosis with plants
(mycorrhizae)
Economic Importance
Fermentation Food
Economic Importance:Antibiotics
Zygomycota
Ascomycota
Basidiomycota
Characteristcs of fungi
•Feed by absorption
•Most are multicellular
•Thread-like filaments called hyphae
•Hyphae organized into mycelium
•Asexual and sexual reproduction
•Chitin cell walls
Fusion of cytoplasm
Heterokaryotic stage
Fusion of nuclei
Diploid stage
Haploid stage
ZygomycotaZygote fungi
Rhizopus stolonifer
Pilobolus crystallinus
Ascomycota: Sac fungi
PezizaMorels
Ergot
Penicillium
Morelss
Ergot alkaloids
Responsible for Salem witch
trials?
Ergotamine is a precursor to LSD
Basidiomycota: Club fungi
Pileus
Stipe
Gills
Fungi imperfecti (once called Deuteromycota)
• Imperfect or asexual fungi
• Reproduce only vegetatively (asexually)
• Many human diseases are imperfect fungi
• Athlete’s foot, ringworm, candida “yeast” infections
• A fungi from this group is used to make Roquefort and blue cheeses
Lichena symbiotic relationship between fungi and algae or cyanobacteria (commonly Nostoc)