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4 de jun. de 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.
In a closed growth system, a bacterial population usually exhibits a predictable pattern of growth - its growth curve - that follows several stages or phases. During the lag phase growth is relatively flat and the population appears either not to be growing or growing quite slowly as newly inoculated cells are adapt to their new environment.
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).
8 de feb. de 2024 · The growth curve has discrete and recognizable phases that reflect distinct physiological states of the cells in culture: the lag phase as the organism adjusts to environmental conditions and adjusts its physiology to enable rapid growth; the exponential growth phase, where growth is constant and rapid – this phase is the most ...
These “growth curves” have a characteristic shape: an initial period, known as the lag phase, in which no growth is detected, followed by a period of exponential growth (known as the exponential phase), followed by a slowing down and eventual cessation of net growth, known as the stationary phase.
In most bacteria, growth first involves increase in cell mass and number of ribosomes, then duplication of the bacterial chromosome, synthesis of new cell wall and plasma membrane, partitioning of the two chromosomes, septum formation, and cell division.
Learn about the bacterial cell cycle, binary fission, generation time, and growth curves. Explore the factors that affect bacterial growth and the methods to measure cell counts and viability.
