Water potential, the inherent capacity of water molecules to move from one site to another when conditions dictate, is typically represented by the Greek letter ____.

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Water potential is represented by the Greek letter ψ (psi). It is a concept used in plant and soil science to describe the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure, or matrix effects such as capillary action.

Water Potential, the Inherent Capacity of Water Molecules to Move