Explain what happens to the cells of a leaf to cause wilting

Ref to osmosis ; water, lost from / moves out of, cells / vacuoles ; down water potential gradient ; pressure of, water / cell contents, on (inelastic) cell wall decreases ; correct ref. to turgor / turgidity / flaccid / plasmolysed ; ref. to plants / cells, rely on water, for (structural) support / to prevent wilting ; ora water in cells not being replaced as quickly (as it is being lost) ; AVP ;;