Fungi pt 2

lichen

dual organism between a phototroph & a fungus

what does fungus provide for algae

protection from dessication

what does algae provide for fungus

provides photosynthates

crustose lichen

foliose lichen

fruticose lichen

Phylum Ascomycota

ascocarp: fruiting body where asci develops

• “sac” fungus

• lichen/non lichen forms

• plant, insect, human pathogens

• penicillin

important food source of ascomycota

• moldy cheese

• morels/truffles

• beer/wine

• yeasts

ascomycota sexual reproduction

• karyogamy

• plasmogamy

• meiosis: 2n → 4 nuclei (1n)

• mitosis forms 8 ascospores that are released from ascus (sac)

karyogamy

fusion of nuclei forming a diploid zygote

plasmogamy

fusion of cytoplasm from 2 mating types

Phylum Ascomycota

• ascopores

• ascus

• fruiting body

1. dikaryotic hyphae (n+n)

2. karyogamy (2n)

3. meiosis (1n)

4. mitosis (n)

ascomycota asexual reproduction

• yeasts - budding or binary fission

• conidia

conidia

asexual spores that form at the tip of specialized hyphae called conidiophores

Penicillin sp.

• conidiospores

• sterigmata

• conidiophore

Aspergillus sp.