Turgor Pressure

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Turgor Pressure
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• Turgor Pressure is the main pressure of the cell
  contents against the cell wall in plant cells and
  bacteria cells, determined by the water,
  resulting from osmotic pressure.

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Turgor Pressure

• Turgor is a force exerted outward on a plant cell
  wall by the water contained in the cell.

Plant cell filled with water ?
Wilted plant cell ?
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How does Turgor Pressure Work? Osmosis

• Osmosis diffusion of water through a
  selectively permeable membrane
• Water moves from high to low concentrations

• Water moves freely through pores.
• Solute (green) to large to move across.

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Plant cells
So, plant cells have a thick cell wall
surrounding the cell membrane.
Plant cells usually have a humongous
water-filled vacuole, called a central vacuole,
that pushes out on the cell membrane to keep the
cell rigid and tough. If the vacuole loses too
much water, it will cause the cell to become
limp. If too many cells suffer this fate, the
entire plant will wilt and its leaves will
lose their shape and strength and droop.