Question

What are the units for osmotic potential?

Answer 1

The unit of osmotic potential is “psi” notated as φ.

osmotic potential (OP value) a measure of the tendency of a solution to withdraw water from pure water by OSMOSIS across a differentially permeable membrane. Pure water has an osmotic potential of zero at one atmosphere pressure. The OP value of any solution is always negative. Osmotic pressure is a measure of the tendency for water to move into a solution by osmosis, and is expressed as a positive value.

Answer 2

$\textbf{\large{Answer -}}$

The unit of osmotic potential is psi.

Osmotic potential causes change in the movement of water molecules.

The difference in osmotic potential tends to make movement of water molecules.

The water molecules moves from high osmotic potential to the low osmotic potential region.

For example, the uptake of water from the roots to shoots is only possible because of this.

The root have a high osmotic potential while the shoots have low osmotic potential therefore the water moves from high to low.