write the transportation of water in plant due to root pressure
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At night in some plants, root pressure causes guttation or exudation of drops of xylem sap from the tips or edges of leaves. ... 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.
Root pressure, in plants, force that helps to drive fluids upward into the water-conducting vessels (xylem). ... It is primarily generated by osmotic pressure in the cells of the roots and can be demonstrated by exudation of fluid when the stem is cut off just aboveground.
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