Uptake of Water

• Uptake of water is caused by water loss in leaves which lowers its water potential
• Water moves from xylem to leaf tissues via osmosis
• Water moves up the stem in the xylem due to tension (because of cohesion of water molecules to each other) caused by water loss from the leaves
• Ends with the gain of water through roots
• This upward flow of water is called the transpiration stream