Transport of water (and ions) up the plant. Also gives strength to the plant
Transpiration*
The transpiration stream is the movement of water from the roots of the plant up the steam to the leaves. Water moves into the plant roots by osmosis and continues to move across the cells of the roots to the xylem in the centre. There is a continuous gradient of water potential from water in the soil to the cells in the centre. The water in the soil has a higher water potential then that of the water inside the cells so water is continuously moving into the cells. …
