Bacteriology

1. CHAPTER # 2
Bacteria and cyanobacteria

2. Morphology
of bacteria

3. Structure of bacterial
cell
• Capsule
• Cell wall
• Cell membrane
• Cytoplasm
• Nucleoid
• Plasmid
• Ribosomes
• Flagellum
• Pilli

4. Growth in bacteria
• Lag phase
• Log phase
• Stationary phase
• Death or decline phase

5. Reproduction
Asexual method
• Binary fisson
• endospore formation
•
Sexual method
Bacterial recombination
1. transformation
2. Transduction
3. Conjugation

6. Binary fission

7. Endospore formation
Video link
https://highered.mheducation.com/sites/
9834092339/student_view0/chapter28/b
acterial_endospore_formation.html

8. Bacterial
transformation
(Griffith experiment)
https://www.youtube.com/watch?v=4LU
71ubTCZA

9. Bacterial conjugation

10. Bacterial transduction

11. Specialized and
generalized
transduction
https://www.youtube.com/watch?v=Zxb
PYekSTLg
(specialized transduction )
https://www.youtube.com/watch?v=C44
ymgwgA-o
(generalized transduction)

12. Nostoc
Habitat
Structure of colony
Structure of cell
Reproduction method

13. Habitat
Nostoc is a diverse genus
of cyanobacteria. They are
found in gelatinous colonies,
composed of filaments called
"trichomes" surrounded by a
thin sheath. They are common
in both aquatic and terrestrial
habitats

14. Structure of colony
Round colony
Gelatinous material contain internal
fillamnets called trichomes

15. Structure of nostoc cell
• Hetrocyst
• Trichomes
• Akinites

16. Reproduction
• Vegetative reproduction
• Hormogonia
• Akinites or anthrospores
• Hetrocysts
• Endospore formation