Growth Curve of bacteria | Microbiology | Unit1 | 3rd semester | B.pharma with notes
Автор: Gyan Ki Gareebi
Загружено: 2021-06-05
Просмотров: 450
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Growth curve of Bacteria | Microbiology | unit1 | 3rd semester | Bpharmacy with handwritten notes.
NOTES:https://drive.google.com/file/d/1JYCw...
When a graph is plot between the growth of bacteria and time phase is called growth curve.
The resulting curve has four distinct phases:-
1) Lag phase
2) Log phase
3) Stationary phase
4) Decline or death phase
1. Lag phase---- In this phase, their are no growth of bacteria, because culture media is just prepared, so upto 2 to 3 hours their are no growth of bacteria, only nutrition medium is present.
2. Log phase- In this phase, their are maximum growth of bacteria, because after the germination of bacteria, they reproduce in fast rate and bacteria increases, and their are nutritions are more than the bacteria, so bacteria grow maximum. Also called as Exponential phase.
3. Stationary phase-- In this phase, growth of bacteria because no. of birth of bacteria is equal to the no. of death of bacteria.
It is just happened due to lack of nutrition medium.
4. Death or decline phase-- In this phase, bacteria start dying, because no. of bacteria is more than nutrition medium.
So due to lack of nutritions, bacteria start dying.
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