HORTICULTURE

Detailed explanation-1: -The water molecules stick together and get pulled up by the force called tension. This force is exerted because of the evaporation at the surface of the leaf. Cohesive and adhesive properties of water molecules to form an unbroken continuous water column in the xylem.

Detailed explanation-2: -As transpiration occurs, it deepens the meniscus of water in the leaf, creating negative pressure (also called tension or suction). The tension created by transpiration “pulls” water in the plant xylem, drawing the water upward in much the same way that you draw water upward when you suck on a straw.

Detailed explanation-3: -In the xylem vessels, water molecules are strongly attracted to each other and exhibit a “stickiness” called cohesion that is due to the formation of hydrogen bonds between different water molecules. The “stickiness” between water molecules and the xylem vessel walls is called adhesion.