1. Symbiosis

2. Sym biosis
together
life

3. Examples

4. Mutualism: Nitrogen fixing bacteria and Plants

6. Soya bean infection with Rhizobium
Nodule formation 1
Soya bean infection with Rhizobium

7. Nodule formation 2

8. Nodule formation 3

9. Nodule formation 4

10. Lens culinaris (lentil) root nodulation.
TEM photomicrographs

11. Clover root nodules.
Leghaemoglobin

12. Notes on N fixation

13. Myco rrhizae
Fungus
Root

14. Ectomycorrhizae Fungal structures in soil Absorptive hyphae Mycellial
strand
Scleridia
Mycorrhizal
root
Rhizomorphs
Soil mycellium

19. Vesicular arbuscular mycorrhizae (VAM)
Endotrophic

20. Appressorium
At entry point
Epidermis
Intercellular
hyphae in air
channel
Hypodermis
Intracellular
hyphae
Arbuscules
Vesicle
Cortex