Growth and Cell Division

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Presentation transcript:

Growth and Cell Division Binary fission No mitosis Multiple chromosomes Budding Yeasts and some bacteria Unequal partitioning of cytoplasm

Bacterial Growth Curve Lag phase Log phase Stationary phase Death phase

Physical Factors Affecting Bacterial Growth Temperature Psychrophiles Psychrotrophs Mesophiles Thermophiles Extreme thermophiles

Physical Factors Affecting Bacterial Growth - Oxygen Obligate aerobe Obligate anaerobe Microaerophile Facultative anaerobe Aerotolerant anaerobe

Physical Factors Affecting Bacterial Growth Hydrostatic pressure Osmotic pressure Radiation

Nutritional Factors Affecting Bacterial Growth Carbon source Nitrogen source Sulfur/ phosphorus Trace elements Vitamins Nutritional complexity

Culturing Bacteria - Streak Plates Streak plate method

Culturing Bacteria - Pour Plates Pour plate method

Culture Media Purposes Selective media Differential media Enrichment media Propagation media Types Defined Complex