CH 22. Fungi
Learning Outcomes
Deacribe the main characteristics of fungi.
Describe the types of reproductive structures
formed by each group of fungi.
Name a few common examples of each
group of fungi.
Explain mutualism and the structure and
functioning of lichens.
Fungi
are non-photosynthetic
secrete enzymes to digest food, then absorb nutrients
consist of chains of cells (hyphae)
have cell walls containing chitin (a polysaccharide)
produce spores
Fungi
are grouped according to their reproductive structures
chytridiomycetes
chytrids
glomeromycetes
zygomycetes
zygote fungi
ascomycetes
sac fungi
basidiomycetes
club fungi
Fungi
spores can be produced asexually or sexually
Fungi
Chytridiomycetes
mostly aquatic
can be decomposers or parasites
Fungi
Zygomycetes
zygospores formed by fusion of hyphae
of two different individuals
Fungi
Ascomycetes
spores are aligned in a sac called an ascus
yeast - the exception
(single-celled)
usually reproduces asexually
Fungi
Basidiomycetes
after hyphae fuse, they form
a fruiting body (the mushroom)
the gills of the mushroom have
the spore-forming basidia
along their edge.
Lichens
mutualism
the fungus protects the alga
the products of photosynthesis are shared
green algae or
cyanobacteria
fungal hyphae