Question

Pressure potential in the xylem of an actively transpiring plant is

• A. Zero (0)
• B. Negative (-)
• C. Positive (+)
• D. + 0.1 MPa

Hint:

Remember:
- Living plant cell $\rightarrow$ Positive pressure potential ($\Psi_p > 0$, turgor).
- Transpiring xylem $\rightarrow$ Negative pressure potential ($\Psi_p < 0$, tension).

Answer 1

The Correct Option is B