Microbial Minilecture 4: Being Small in a Big World
A. Outline
a. Adaptations to a Changing Environment
1) Temperature
2) Pressure
3) pH
4) Oxygen Availability
B. Adaptations to a Changing Environment
a. Temperature
1. Effect on Growth Rate
2. Effect on Proteins
3. Examples of Adaptations
b. Pressure
1.
Barophiles, Barotolerant and Barosensitive microbes
2.
Adaptations to High Pressure
c. Water Activity and Salt
1. Water Activity
2. Responses to Osmotic Stress
a. Aquaporins
b. Compatible Solutes
c. Pressure-Sensitive Channels
d. Global Responses
2.
Halophiles
d. pH
1. Neutrophiles, Acidophiles, Alkaliphiles
2. pH Homeostasis and Acid Tolerance
e. Oxygen and Other Electron Acceptors
1. Oxygen as the terminal electron acceptor
2. Aerobes, Anaerobes and Facultative Microbes