Element responsible for maintainig turgor is

The element responsible for maintaining turgor is K.
"Potassium's biggest role is to maintain turgor pressure by regulating osmotic pressure in the plant, by moving water around."
Turgor pressure is the hydrostatic pressure over ambient atmospheric pressure which can build up in living, walled cells. Turgor is generated through the osmotically driven inflow of water into cells across a selectively permeable membrane; this membrane is typically the plasma membrane.