Question

Xylem tissue transporting water due to transpiration is an example of

• A. positive 𝚿p
• B. negative 𝚿p
• C. 𝚿w
• D. 𝚿s

Answer 1

The correct option is B negative 𝚿p

Component of 𝚿w contributed by the application of pressure by the solution is the pressure potential (𝚿p).
Magnitude of change in the 𝚿w due to the mechanical pressure is the pressure potential (𝚿p).
When water enters a regular cell through diffusion, the cell expands and applies pressure on the cell walls of plants. This is an example of positive pressure potential (𝚿p) or turgor pressure.
Xylem tissue transporting water due to transpiration is an example of negative pressure potential (𝚿p).
Decrease in magnitude of 𝚿w due to the dissolution of solute is the solute potential (𝚿s).
Kinetic energy (KE) or the free energy (energy available to the molecules) of water is the water potential (𝚿w).