Question

Which of the following equation is wrong?

• A. ${\psi }_s=-\pi$
• B. DPD = – OP + TP
• C. ${\psi }_w={\psi }_s+{\psi }_p$
• D. ${\psi }_w=-DPD$

Answer 1

The correct option is B DPD = – OP + TP

DPD stands for diffusion pressure deficit. It is the reduction in the diffusion pressure of water in solution or cell over its pure state due to the presence of solutes in it. It's value is calculated by the formulae
DPD = OP - TP, where OP stands for osmotic pressure and TP stands for turgor pressure. Water always flows from an area of lesser DPD towards an area having higher DPD.