Question

The term water potential is also used for ________ pressure.

• A. suction
• B. osmotic
• C. wall
• D. turgor

Hint:

Suction pressure, also known as diffusion pressure deficit, is the older term for water potential.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
Earlier, the ability of a cell to absorb water was called diffusion pressure deficit (DPD), also known as suction pressure.

Step 2: Modern term
The modern term water potential (\(\Psi_w\)) expresses the same property; numerically \(\Psi_w\) is the negative of suction pressure.

Step 3: Other options
Osmotic pressure corresponds to solute potential, and turgor or wall pressure corresponds to pressure potential, not to water potential as a whole.

Final Answer:
Water potential is the term used for suction pressure. \[ \boxed{\text{(A) }\text{suction}} \]