Question

What is diffusion pressure deficit? (DPD)

Answer 1

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Answer 2

Answer:

Diffusion Pressure Deficit (DPD):

• Diffusion pressure deficit (DPD) is the difference between diffusion pressure of pure water and solution.
• DPD is also called suction force (SF) or suction pressure (SP).
• DPD, i.e. diffusion pressure deficit of a solution is initially equal to its osmotic pressure (OP).
• When water enters into a cell, the increasing turgor pressure (TP), forces the cytoplasm against cell wall.
• The cell wall exerts an equal and opposite pressure (WP) on the cell sap. This can be represented as:

DPD = OP-TP (WP)

In this, DPD is diffusion pressure deficit, OP is osmotic pressure, TP is turgor pressure and WP is wall pressure.