A physical basis for the precise location of the division site of rod-shaped bacteria: the Central Stress Model

Article Abstract:

The Central Stress Model for the division of bacterial cells proposes that cells divide from the center due to higher stress on the cytoplasmic membrane (CM). Hydrostatic pressure at the poles and the flow of lipids from the poles during the formation of the murein sidewall produces stress. Areas of lower stress in the murein sidewalls also increases the stress at CM. A sensory substance which promotes division at the center senses the changes in stress. Division can also occur at the sites of lower stress in the murein sidewalls.

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Phase and electron microscope observations of osmotically induced wrinkling and the role of endocytotic vesicles in the plasmolysis of the gram-nehative cell wall

Article Abstract:

Phase and electron microscopy shows that cells exposed to high levels of sucrose develop wrinkling of the cell wall followed by the formation of plasmolysis spaces and endocytotic vesicles. The vesicles are membrane-bound and compensate the increase in the cytoplasmic membrane (CM) as the membrane cannot contract significantly. Plasmolysis spaces are seen frequently at the cell poles and constriction regions. During mild osmotic shock, lamellar spaces form near the sidewalls which are linked to vesicle formation.

Research, Escherichia coli, Gram-negative bacteria, Plasma membranes, Endocytosis

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The bacterium's way for safe enlargement and division

Article Abstract:

This review traces the developmental aspects of bacterial evolution and propagation and the key role played by the peptidoglycan wall in the exoskeleton strategy to tackle osmotic challenges surrounding the cells. The production of sacculus and cell division enabled them to propagate and establish.

United States, Analysis, Genetic aspects, Bacterial growth, Composition, Developmental biology, Evolution (Biology), Microorganisms, Evolution, Bacterial cell walls

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