Two Types of Cells Prokaryotic Eukaryotic Prokaryotic Eukaryotic.
CH. 5 PROKARYOTIC GROWTH. TBL05_01: Some microbial record holders.
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Transcript of CH. 5 PROKARYOTIC GROWTH. TBL05_01: Some microbial record holders.
![Page 1: CH. 5 PROKARYOTIC GROWTH. TBL05_01: Some microbial record holders.](https://reader036.fdocuments.in/reader036/viewer/2022062500/56649f135503460f94c2765b/html5/thumbnails/1.jpg)
CH. 5PROKARYOTIC GROWTH
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TBL05_01: Some microbial record holders
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Figure 05.01: Atacama Desert
© Photodisc/age fotostock
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Figure 05.02a: Binary fisson of bacteria
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Figure 05.02b: A false color TEM of a cell of Bacillus licheniformis undergoing binary fission
© Lee Simon/Photo Researchers, Inc.
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Figure 05.03: A skyrocketing bacterial population
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Growth curve plotted in logs and arithmatically
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Figure 05.04: Bacterial growth curve
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Figure 05.05a: Bacterial colony on blood agar
Courtesy of Dr. J. J. Farmer/CDC
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Figure 05.05b: Salmonella typhi culture
Courtesy of CDC
Note the slimy colonies of Salmonella typhi, denoting
capsules
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Figure 05.06b: Bacillus anthracis spore
© Scott Camazine/Alamy Images
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Figure 05.06c: Germinating spore
Courtesy of Janice Carr/CDC
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Figure 05.07: The formation of a bacterial spore
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BACTERIAL GROWTH IS AFFECTED BY MANY
FACTORS
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TBL05_01: Some microbial record holders
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Oxygen can support or hinder growth
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Figure 05.09abc: Bacterial cultivation in different gas environments
© Scott Coutts/Alamy Images
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Figure 05.10: The effect of oxygen on prokaryotic growth
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Hyperbaric chamber
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Most bacteria like to grow at a neutral pH
• Optimal pH for growth
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Figure 05.12a-e: The streak plate isolation method
Courtesy of James Gathany/CDC
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Population growth can be measured in several ways
• Turbidity• Direct measurements• Indirect methods
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Counting Bacteria by MPN (most probable number)
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Figure 05.13: Direct counting procedure using the Petroff-Hausser counting chamber
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Counting bacteria by filtration
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Counting bacteria by measuring turbidity in a broth culture
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Figure 05.14: The standard plate count
© R.A. Longuehaye/Photo Researchers, Inc.
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BACTERIAL DEATH
Bacteria die at a constant rate
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Death Curve