define transpiration pull. what is the advantage of transpiration pull over root pressure
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Answers
Transpiration pull is the force which aids in drawing the water upward from roots to leaves. In leaves, some amount of water is used for photosynthesis and excess water is released into atmosphere. ... Root pressure is caused by this accumulation of water in the xylem pushing on the rigid cells.
Answer:
Definition:It is a process call Transpiration in which water molecules move upwards from the roots and eventually escape from the stoma of leaves in the form of vapor. When a water molecule escapes out into the atmosphere through a stoma, it pulls the water molecule below it to take its place.
Advantage:Without transpiration to carry the ions up the stem, they accumulate in the root xylem and lower the water potential. Water then diffuses from the soil into the root xylem due to osmosis. Root pressure is caused by this accumulation of water in the xylem pushing on the rigid cells.