When Is Turgor Pressure Negative?

A negative turgor pressure would mean that the water in the protoplasm and vacuole is under tension like it normally is in the xylem. In the apoplast (cell wall and xylem) P should be construed as the hydrostatic tension or pressure potential rather than the turgor pressure.

Is turgor pressure always negative?

While the turgor pressure in most cells is inherently positive, it is negative in the xylem of a transpiring plant. ... The loss of water through transpiration causes high surface tension and negative turgor pressure in the xylem.

Is turgor pressure positive or negative feedback?

The observations suggest that a negative feedback loop is used to regulate the turgor pressure. An increase in the turgor pressure is sensed by the cell and this leads to a reduction of K⁺ transport.