i) Write the relation between Diffusion Pressure Deficit (DPD), Osmotic Pressure (OP), and Turgor Pressure (TP).
ii) "OP and DPD are equivalent in a flaccid cell". Give reason.

**OR**

i) Write the relation between Water Potential (ψw), Osmotic Potential (ψs) and Pressure Potent

Question

i) Write the relation between Diffusion Pressure Deficit (DPD), Osmotic Pressure (OP), and Turgor Pressure (TP).
ii) "OP and DPD are equivalent in a flaccid cell". Give reason.

**OR**

i) Write the relation between Water Potential (ψw), Osmotic Potential (ψs) and Pressure Potential (ψp).
ii) Calculate water potential of solution which is enclosed in a semi permeable membrane whose Osmotic Potential is –35 bar and Pressure Potential is –5 bar.

Accepted Answer

>

> [!TLDR]
> Diffusion Pressure Deficit equals Osmotic Pressure minus Turgor Pressure; since a flaccid cell has zero turgor pressure, its DPD becomes equal to its OP.
>
> i) Relation between DPD, OP and TP: DPD (also called suction pressure, SP) is the extent to which a cell's diffusion pressure of water is less than that of pure water, and it is given by DPD = OP - TP, where OP is the osmotic pressure of the cell sap (which tends to pull water in) and TP is the turgor/wall pressure (which pushes back against the incoming water, opposing further entry).
> …

Q.i) Write the relation between Diffusion Pressure Deficit (DPD), Osmotic Pressure (OP), and Turgor Pressure (TP).

Concept understanding — Plant–Water Relations and Soil Water

Plant–Water Relations and Soil Water

Q.i) Write the relation between Diffusion Pressure Deficit (DPD), Osmotic Pressure (OP), and Turgor Pressure (TP).

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