Explain how this pressure potential can be negative?

Explain how this pressure potential can be negative? this increases the pressure potential. Pressure pptential iS usuu positive, though in plants or tension in t_he water column a major role in water transpert_up a stem. Pressure potential is denoted as . Water potential of a cell iS affected by both solute and pressure

Pressure potential increases as water enters a cell. As water passes through the cell wall, it increases the total amount of water present inside the cell, which exerts an outward pressure that is opposed by the structural rigidity of the cell wall.
By creating this pressure, the plant can maintain turgor, which allows the plant to keep its rigidity.
Without turgor, plants will lose structure and wilt.

The pressure potential in a plant cell is usually positive. In plasmolysed cell, pressure potential is almost zero.
Negative pressure potentials occur when water is pulled through an open system like xylem vessel. Withstanding negative pressure potentials is an important adaptation of xylem. This negative pressure potential pulls water upward constantly.

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