In biology, turgor pressure or turgidity is the pressure of the cell contents against the cell wall, in plant cells, determined by the water content of the vacuole, resulting from osmotic pressure. i.e. the hydrostatic pressure produced by a solution in a space divided by a semipermeable membrane due to a differential in the concentration of solute. Turgid plant cells contain more water than flaccid cells and exert a greater osmotic pressure on its cell walls. This article or section does not cite its references or sources. ... Drawing of the structure of cork as it appeared under the microscope to Robert Hooke from Micrographia which is the origin of the word cell. Cells in culture, stained for keratin (red) and DNA (green). ... Schematic of typical animal cell, showing subcellular components. ... Osmotic pressure or turgor (also called turgor pressure) is the pressure produced by a solution in a space that is enclosed by a differentially permeable membrane. ... Hydrostatic pressure is the pressure exerted by a fluid due to its weight. ... Scheme of semipermeable membrane during hemodialysis, where red is blood, blue is the dialysing fluid, and yellow is the membrane. ...

Mechanism

Plant cell under diferent enviroments

When a cell is in a hypotonic environment, water flows across the cell membrane into the cell, causing it to expand due to osmotic pressure. In plant cells, water enters the cell until the inside and outside water potential is equal, however, the cell wall prevents the cell from bursting, resulting in pressure on the cell wall from within. Image File history File links Turgor_pressure_on_plant_cells_diagram. ... Image File history File links Turgor_pressure_on_plant_cells_diagram. ... Drawing of the structure of cork as it appeared under the microscope to Robert Hooke from Micrographia which is the origin of the word cell. Cells in culture, stained for keratin (red) and DNA (green). ... This article or section does not cite its references or sources. ... Illustration of a cell membrane The cell membrane, also called the plasma membrane or plasmalemma, is a semipermeable lipid layer surrounding the cytoplasm of all living cells. ... Plant cell structure Plant cells are quite different from the cells of the other eukaryotic kingdoms organisms. ... Impact of a drop of water. ... A cell wall is a fairly rigid layer surrounding a cell located outside of the plasma membrane (also known, in some cases, as the cell membrane) that provides additional support and protection. ...

The pressure of each cell wall against its neighbour results in stiffness that allows the plant to stay upright. Cells not adapted to hypotonic environments will burst due to the inflow of water if they have no strong membrane or cell wall.

The opposite condition in a plant cell, resulting from immersion in a hypertonic environment, is plasmolysis. Turgor pressure is usually with plant cells. It has been suggested that Hyperosmotic be merged into this article or section. ... Before Plasmolysis. ...

See also

• Cell wall
• Osmotic pressure
• Osmosis

A cell wall is a fairly rigid layer surrounding a cell located outside of the plasma membrane (also known, in some cases, as the cell membrane) that provides additional support and protection. ... Osmotic pressure or turgor (also called turgor pressure) is the pressure produced by a solution in a space that is enclosed by a differentially permeable membrane. ... Osmosis is the net movement of water molecules across a semipermeable membrane from a region of low solute potential to an area of high solute potential (or equivalently, from a region of high solvent potential to a region of low solvent potential). ...

External links

• Osmotic pressure
• How do non woody plants stay upright?