Question

difference between waterpotential and pressure potential . Is both are same.........

Answer 1

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Water potential (Ψ) is actually determined by taking into account two factors - osmotic (or solute) potential (ΨS) and pressure potential (ΨP). The formula for calculating water potential is Ψ = ΨS + ΨP. Osmotic potential is directly proportional to the solute concentration.

Pressure potential Symbol Ψ p. The component of water potential due to the hydrostatic pressure that is exerted on water in a cell. In turgid plant cells it usually has a positive value as the entry of water causes the protoplast to push against the cell wall (see turgor).

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