In which plant cell or tissue would the pressure component of water potential most often be negative?

Question

Quizplus · Accepted Answer

The pressure component of water potential is the pressure exerted by the cell wall on the protoplast. In stem xylem, the water is under tension, which creates a negative pressure, also known as negative pressure potential. This allows the water to be pulled up from the roots to the leaves via transpiration. In the other choices, the pressure potential is either zero or positive.

In Which Plant Cell or Tissue Would the Pressure Component