As water evaporates from the leaves during transpiration, it creates a suction force or tension in the xylem vessels. As a result of transpiration, a suction force is created in the xylem vessel. This force causes the water to be pulled up from the xylem in the roots to the stem and then to the leaves. This suction force helps draw more water up through the stem, which in turn causes the roots to absorb more water from the soil. This pulling force is called transpirational pull.