Symbiotic associationsI. Symbiosis

A. DefinitionB. Types of symbiosis

1. commensalism2. mutualism3. competition4. predation and parasitism

II. MycorrhizaA. DefinitionB. How fungi grow C. Mycorrhizal types

1. endomycorrhizaea. VA mycorrhizaeb. orchidc. ericoidd. monotropoid

2. ectomycorrhizaeIII. Root nodules: legumes and rhizobiumIV. Lichens

I. SymbiosisA. DefinitionB. Types of symbiosis

1. commensalism2. mutualism3. competition4. predation, parasitism, and pathogenicity

Symbiosis Symbiont one

Symbiont two

Example

commensalism

mutualism

competition

predation et al

+ o

+ = positive benefit

- = negative

o = no effect

+ +

- -

+ -

allelopathy + -

II. MycorrhizaA. DefinitionB. How fungi grow

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

mycorrhizae, mycorrhizal

hypha, hyphae

C. Mycorrhizal types1. endomycorrhizae

a. VA mycorrhizae

b. orchidc. ericoidd. monotropoid

nitrogen

Acid soils

2. ectomycorrhizae

Amanita

chanterelle

III. Root nodules: legumes and rhizobium

N2

IV. Lichens

crustose

foliose

fruticose

The end