1. Cyanobacteria

2. Cyanobacteria ‘known as’ BlueGreen Algae
- Cyano = blue
- Bacteria =they are more closely related to prokaryotic bacteria (No Nucleus) than eukaryotic algae

3. Microscopic organisms
Gets energy through photosynthesis
Cyanobacteria can be found in almost every conceivable environment, from oceans to fresh water to bare rock to soil

4. Blue Green Pigment
Phycocyanin BlueGreen Color
Chlorophyll Green Color

5. Forms Forms Unicell – Colonies – Filaments –
Can live as one cell or in colonies, filaments, sheets or hollow balls

6. What are some cell types of blue green bacteria?
Normal cells
Cells with resistant spores (akinetes)
Thick walled cells for fixing nitrogen (heteocysts)
thick walled cell, hollow looking. Larger than vegetative cells.
FUNCTION – provides the anerobic environment for N fixation.

7. Heterocyst

8. Importance Nitrogen Fixation
ONLY cyanobacteria and prokaryotic bacteria can FIX nitrogen

9. What are some parts of blue-green bacteria
Thick, gelatin cell wall
No flagella
How do they reproduce? Hormogonia are filaments that glide away from the main mass, bud, and reproduce.

10. Nostoc
found in soil and in fresh-water
Form: coccoi cells forming filaments in a gelatinous sheath. often with specialized cells called heterocysts and akinetes.
Akinetes formed when colony matures.
Nostoc Often associated with fungi in lichens.

12. Anabaena
similar to Nostoc, except large balls are not normally formed.
anbaena Cells more elongate, less rounded.

15. Oscillatoria
Shape-filaments and covered by multi-layered mucilage, the mucilagenous sheath is longer than the filament

17. Gloeocapsa
Shape-may be unicellular or made up of small groups of cells grouped within mucilage envelopes. and The cells are oval-shaped and enclosed within mucilage.