Question

if you uproot a plant from the soil its leaves soon wilt

Answer 1

If you uproot a plant from the soil,the leaves soon wilt because ::-

First Reason:-

The function of roots is to absorb water and minerals from the soil.
The Xylem transports water from the roots through out all parts of the plants * Including the leaves* as leaves don't get water and minerals, they soon wilt.

Second Reason :-Due to loss of Turgor Pressure:--

The leaves provide organic nutrients through photosynthesis and the Phloem carries the sugar from the leaves back down to the roots.

The cells of plants need to be hypotonic to it's environment where the water moves inside.

Plant cells have cell walls inside to prevent bursting; the water provides *TURGOR PRESSURE*,when the cell's content is pushing against the cell wall and makes the cells look firm.
When you uproot the plant from the soil---- The roots can't absorb water and after some time,
The water, in the plant cells moves outwards because of loss of *TURGOR PRESSURE*
These are the two reasons because of which the leaves will soon wilt, when one uproot a plant.

Hope it helps.