LEAVES ARE THE LUNGS OF PLANTS
In plants, water moves from the
root to the leaves via the stem. The water then leaves the xylem in the leaf and
evaporates into the atmosphere. Water movement is driven by the evaporation
through small pores on the undersides of leaves called stomata. The
stomata of a leaf permit the leaf to control evaporative cooling and water loss.
• Cools the the plant
• Moves nutrients up
from the root
• Maintains the turgor
pressure in cells
Turgor pressure is
important for the following reasons:
• It maintains the plant
in an upright position so that it can take advantage of light.
• It is important for the
functioning of the guard cells, which surround the stomata and regulate water
loss and carbon dioxide uptake.
• It is the force that
pushes roots through the soil.