Guttation is mainly due to

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(A) Guttation refers to the exudation of liquid drops from the margins and tips of leaves through specialized structures called hydathodes.The develop

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Root pressure

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(A) Guttation refers to the exudation of liquid drops from the margins and tips of leaves through specialized structures called hydathodes.The development of root pressure in a plant leads to positive hydrostatic pressure in the xylem sap throughout the plant.Because the water-conducting xylem elements of a vascular bundle terminate in hydathodes,the xylem sap is forced to flow through these structures.Thus,in guttation,water is exuded from the leaf due to the positive pressure generated by the roots.

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