If a cell A with OP 10 bars and TP 4 bars are connected to cells B, C and D having OP and TP 4 and 4, 10 and 5 and 7 and 3 bars respectively, the flow of water will be

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TestHub · Accepted Answer

Diffusion pressure deficit (DPD) represents the absorbing capacity of the cell. It is also called as suction pressure. It is represented by DPD = OP - TP.

The net movement of water will be nil when DPD is zero and water moves from lower DPD to higher DPD. Accordingly, DPD of cell
A is OP - TP = 10 - 4 = 6
B is 4 - 4 = 0
C is 10 - 5 = 5
D is 7 - 3 = 4
Hence, the water flows from B to A, C and D as B is having the lowest DPD, which is zero.

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