Chapter 32 & 33 Flashcards Preview

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Flashcards in Chapter 32 & 33 Deck (13):
1

The Fungus Around Us (3)

1. Absorptive heterotrophs: release enzymes to digest complex molecules, then absorb smaller ones
2. Walls composed of chitin
3. Two phases

2

Two Phases

1. Trophic Phase:
-hyphae network around/in food source
2. Reproductive Phase:
-fruiting body
-produces spores

3

Roles of Fungi (2)

1. Ecological Roles
2. Economic Roles

4

Ecological Roles (2)

1. Decomposes organic matter
2. Symbiotic relationships

5

Economic Roles (3)

1. Edible
2. Medical Uses (antibiotics)
3. Production of beer, cheese, bread and wine

6

Negatives (To Humans) of Fungus (4)

1. Spoil/decompose cloth, food, crops, wood, parasites, plants and animals
2. Pathogens cause health problems like ringworm and athlete's foot
3. Some produce toxins and poison our food
4. Some are toxic to eat

7

Fungal Diversity (5)

1. Basidiomycetes
2. Ascomycetes
3. Glomeromycetes
4. Zygomycetes
5. Chytrids

8

Basidiomycetes (5)

-30,000 species
-Includes mushrooms, shelf fungi, rusts and puffballs
-Decomposers of wood
-Trophic Phase: haploid and dikaryotic
-Fruiting body = basidiocarp (dikaryotic)

9

Ascomycetes (4)

-65,000 species
-Includes yeasts, cup fungi, truffles and morels (many plant pathogens, decomposers and food pharmaceuticals)
-Trophic Phase: haploid hyphae
-Fruiting body = ascocarps

10

Glomeromycetes (3)

-160 species, but ecologically very significant
-Almost all from arbuscular mycorrhizae
-50% of plants have mutualistic relationships with glomerom.

11

Zygomycetes (3)

-1000 species
-Many fastgrowing and responsible for food mold
-Some parasitic or commensal symbionts

12

Chytrids (4)

-1000 species
-Ubiquitous in lakes and soils
-Decomposers but also parasitic (of protists, other fungi, plants, animals)
-Some live in the digestive tract of sheep/cattle

13

Batrachochytrium Dendrobatidis

Likely responsible for the global decline of amphibians