Transport of Water in Plants

The video explains the movement of xylem sap in plants, highlighting the roles of root pressure and transpiration. Root pressure, effective at night, pushes xylem sap upward, while transpiration pull, aided by cohesion and adhesion, is the primary mechanism during the day. The cohesion-tension-transpiration pull model describes how water molecules move through xylem. Guttation occurs when excess water is exuded from leaves under high humidity. The video covers the physical properties of water that facilitate these processes.

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