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Biology 21.2 Fungal Classification

Miller Levine Dragonfly Book
by

Linda Choo

on 29 August 2013

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Transcript of Biology 21.2 Fungal Classification

Fungal Classification
Familiar molds that grow on meat, cheese, and bread are called zygomycetes.

Zygomycetes have life cycles that include a zygospore.

A zygospore is a resting spore that contains zygotes formed during the sexual phase of the mold's life cycle.
The Common Molds
The basidiospores of club fungi are produced on thin structures called
fruiting bodies.
buttons.
gills.
stalks.
The fungus causing the extinction of amphibians is a(an)
ascomycete.
basidiomycete.
chytridiomycete.
zygomycete.
Fungi grow best in an environment that is
cool.
moist.
dry.
salty.
The chytrids are the most primitive of the fungi and are mostly decomposers, degrading chitin and keratin.

Many species live in fresh water.

At least one species has been found to be parasitic and causing a disease in amphibians called chytridiomycosis.
The Chytrid Fungi
Yeasts are unicellular fungi.

Yeasts reproduce asexually by budding.
Dry granules of yeast contain ascospores, which become active in a moist environment.
The Sac Fungi
Sac fungi have a characteristic reproductive structure called a(an)
ascus.
basidium.
budding capsule.
sporophyte.
Yeasts are
ascomycetes.
zygomycetes.
basidiomycetes.
chytridiomycetes.
Life Cycle of Club Fungi
The life cycle of an ascomycete usually includes both asexual and sexual reproduction.
The Sac Fungi
The phylum Ascomycota is named for the ascus, a reproductive structure that contains spores.
The Sac Fungi
Haploid (N) gametes produced in the gametangia fuse with gametes of the opposite mating type to form diploid (2N) zygotes.

Zygotes develop into thick-walled zygospores.
The Common Molds
Fungi are classified according to their structure and method of reproduction.

The four main groups of fungi are:
Common molds (Zygomycota)
Sac fungi (Ascomycota)
Club fungi (Basidiomycota)
Chytrid fungi (Chytridiomycota)
Classification
Classification of Fungi


The spore-bearing structure is called the basidium.
The Club Fungi
The phylum Basidiomycota, or club fungi, gets its name from a specialized reproductive structure that resembles a club.

The spore-bearing structure is called the basidium.

Basidia are found on the gills of the fruiting body.
The Club Fungi
Copyright Pearson Prentice Hall
Gametangia
Rhizoids
Stolon
+ Mating type (N)
- Mating type (N)
Hyphae from different mating types fuse and produce gamete-forming structures called gametangia.
The Common Molds
Basidiomycetes include mushrooms, shelf fungi, puffballs, earthstars, jelly fungi, and rusts.
The Club Fungi
Copyright Pearson Prentice Hall
The Sac Fungi
Sexual Reproduction
Asexual Reproduction
Life Cycle of a Black Bread Mold
The Common Molds
FERTILIZATION
MEIOSIS
Some, like Candida albicans, are parasitic.
Over 200 frog species extinct.
Xenopus
frog
Full transcript