In autecological studies, the growth of bacteria (or other microorganisms, as protozoa, microalgae or yeasts) in batch culture can be modeled with four different phases: lag phase (A), log phase or exponential phase (B), stationary phase (C), and death phase (D).

Log or Exponential Growth Phase: Bacterial cells prepared for cell division during lag phase now enter into the log phase or exponential growth phase during which the cells divide at a maximal rate and their generation time reaches a minimum and remains constant.

Log phase, also referred to as the exponential phase or logarithmic phase, is one of the phases observed in a bacterial growth curve. The striking feature of this phase is the property of cell doubling through binary fission.

Jun 4, 2024 · There are four distinct phases of the growth curve: lag, exponential (log), stationary, and death. The initial phase is the lag phase where bacteria are metabolically active but not dividing. The exponential or log phase is a time of exponential growth.

The population then enters the log phase, in which cell numbers increase in a logarithmic fashion, and each cell generation occurs in the same time interval as the preceding ones, resulting in a balanced increase in the constituents of each cell.

A typical bacterial growth curve consists of four phases: lag, log, stationary, and death. This bacterial growth curve reflects the events in the bacterial populations when grown in a closed system of microbial culture of fixed volume (i.e., batch culture).

Mar 28, 2024 · In the log phase, bacterial growth is at its maximum, with the number of viable bacteria increasing exponentially. This phase is of particular interest in microbiological research and various applications. The stationary phase occurs when the rate of cell division equals the rate of cell death, resulting in a stable population size.

Feb 1, 2025 · There are four phases in the standard growth curve of a microorganism. When a log10 scale is used, the scale increases by a factor of 10 each time; this allows large increases in numbers to be shown on a single graph. You won’t be expected to convert values into logarithms or create a log scale graph in the exam.

Feb 5, 2022 · Log phase: This phase is characterized by rapid exponential cell growth (i.e., 1 to 2 to 4 to 8 and so on). The bacterial population doubles during every generation.

Jul 18, 2022 · The Log Phase. In the logarithmic (log) growth phase, sometimes called exponential growth phase, the cells are actively dividing by binary fission and their number increases exponentially.