can you please explain these terms.....1- transpirational pull,2-root pressure..both seems confusing..and also give its differences ...

Asked by keshav krishna | 7th Jun, 2013, 09:52: PM

Expert Answer:

Root pressure is caused by active transport of mineral nutrient ions into the root xylem. It is caused by this accumulation of water in the xylem pushing on the rigid cells. Root pressure provides a force, which pushes water up the stem, but it is not enough to account for the movement of water to leaves at the top of the tallest trees.

Transpirational pull is the flow of water in the xylem tissues of large plants. It results from the evaporation of water from the surfaces of cells in the interior of the leaves.

Answered by  | 11th Jun, 2013, 11:31: AM

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