Symbiosis

Sym biosistogether life

Examples

Mutualism: Nitrogen fixing bacteria and Plants

Nodule formation 1

Soya bean infection with Rhizobium

Nodule formation 2

Nodule formation 3

Nodule formation 4

TEM photomicrographs

http://www.sunderland.ac.uk/~es0man/tem2.htm

Lens culinaris (lentil) root nodulation.

Leghaemoglobin

Clover root nodules.

Notes on N fixation

Myco rrhizaeFungus Root

Ectomycorrhizae

Fungal structures in soilAbsorptive hyphae

Mycellialstrand Scleridia

Mycorrhizalroot

Soil mycellium

Rhizomorphs

http://www.ffp.csiro.au/research/mycorrhiza/ecm.html

http://www.ffp.csiro.au/research/mycorrhiza/ecm.html

Vesicular arbuscular mycorrhizae

(VAM)

http://www.ffp.csiro.au/research/mycorrhiza/ecm.html

Endotrophic

Epidermis

Hypodermis

CortexVesicle

Intracellularhyphae

AppressoriumAt entry point

Arbuscules

Intercellular hyphae in airchannel

http://www.ffp.csiro.au/research/mycorrhiza/ecm.html