Diauxic growth is a growth of cells which is characterized by the two phases of cellular growth. It can be depicted by a diauxic growth curve. The cause of these two cellular growths in the presence of two types of sugars in the growth media. One of these sugars has the ability to be easily metabolized by the target bacterium. This is a preferred sugar as it is consumed first and it also helps the cell culture to undergo rapid growth.
This is followed by the lag phase in which the cellular machinery which is responsible for the metabolism of the second sugar is activated. In this way, the second sugar is also consumed. Now, when the food begins to utilize, the bacterium enters the log phase and a second peak on the growth curve is formed.
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