Chapter 34.2, Problem 3R

Summary Introduction

To review:

The importance of all the three parts of the transpiration-cohesion-tension mechanism in the transfer of water through the xylem.

Introduction:

The water in the xylem of the plants moves primarily by three forces—transpiration, cohesion, and tension. Loss of water from the plant through stomata in form of vapors is known as transpiration. The water in the column of xylem moves because of its cohesion (sticking together of water molecules by hydrogen-bonding) and adhesion (hydrogen-bonding between the water molecules in the sap and the molecules present in the cell walls of xylem) properties.