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Symbiotic associations. I. Symbiosis A. Definition B. Types of symbiosis 1. commensalism 2. mutualism 3. competition 4. predation and parasitism II. Mycorrhiza A. Definition B. How fungi grow C. Mycorrhizal types 1. endomycorrhizae a. VA mycorrhizae b. orchid

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symbiotic associations
Symbiotic associations

I. Symbiosis

A. Definition

B. Types of symbiosis

1. commensalism

2. mutualism

3. competition

4. predation and parasitism

II. Mycorrhiza

A. Definition

B. How fungi grow

C. Mycorrhizal types

1. endomycorrhizae

a. VA mycorrhizae

b. orchid

c. ericoid

d. monotropoid

2. ectomycorrhizae

III. Root nodules: legumes and rhizobium

IV. Lichens

i symbiosis
I. Symbiosis

A. Definition

B. Types of symbiosis

1. commensalism

2. mutualism

3. competition

4. predation, parasitism, and pathogenicity

Symbiont

one

Symbiont

two

Example

Symbiosis

commensalism

+

o

+

+

mutualism

-

-

competition

+ = positive benefit

+

-

predation et al

- = negative

-

allelopathy

+

o = no effect

ii mycorrhiza
II. Mycorrhiza

A. Definition

B. How fungi grow

mycorrhiza (fungus-root): relationship between plant roots and fungi

mycorrhizae, mycorrhizal

hypha, hyphae

c mycorrhizal types
C. Mycorrhizal types

1. endomycorrhizae

a. VA mycorrhizae

b. orchid

c. ericoid

d. monotropoid

nitrogen

Acid soils

2 ectomycorrhizae
2. ectomycorrhizae

Amanita

chanterelle

iv lichens
IV. Lichens

crustose

foliose

fruticose