The Kingdom Fungi


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This presentation is Copyright 2000 by Thomas J. Volk, University of Wisconsin-La Crosse

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Table of Contents

The Kingdom Fungi


Classification of Organisms

Three Domains

The five kingdom system-- or four or five kingdoms within Eukarya

Alternatively, The three kingdom system:

Classification of Fungi

White button pizza mushroom

Characteristics of fungi

more fungi characteristics 2

more fungi characteristics 3

more fungi characteristics 4

Recent molecular evidence strongly suggests that fungi are probably more closely related to animals that to either plants or protists!

Lack of Chlorophyll profoundly affects the lifestyle of fungi:

The vegetative growth form in a great majority of the fungi consists of a system of thread-like, walled, more or less cylindrical, hyphae (singular --hypha) making up what is called a mycelium (plural--mycelia). Some have a single celled vegetative form called a yeast.

Nutritional status of fungi



Mutualists (symbionts):


Types of Mycorrhizae




Lichen ecology

Lichen uses


As a group, fungi are very successful organisms:

Many fungi are harmful to human interests:

Many fungi are very useful to humans:

Fungi are important experimental organisms

Asexual and Sexual Reproduction in fungi

Sexual Reproduction (teleomorph)

Sexual reproduction

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Nuclear cycles of various fungal groups

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Four major phyla of Fungi, based on the method of producing sexual spores:

Chytridiomycota — sexual and asexual spores motile, with posterior flagella

Zygomycota— sexual spores are thick walled resting spores called zygospores --asexual spores are borne internally in a sporangium

Ascomycota—sexual spores borne internally in a sac called an ascus-- asexual spores are borne externally as conidia

Basidiomycota—sexual spores borne externally on a club-shaped structure called a basidium. Usually no asexual spores

“deuteromycetes”-- no known sexual state, usually reproduces by conidia as asexual state

Asexual reproduction

Asexual Spores

Asexual spores

Yeast reproduction

Fruiting bodies

Surface area and reproduction

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Blunt ridges

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Upright branches (corals)

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Thanks for visiting!

Author: Tom Volk
Dept. of Biology
3024 Cowley Hall
University of Wisconsin-La Crosse
La Crosse, WI 54601 USA


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