Question

Water is drawn upward from the roots through plant tissue to the leaves by what?

Answer 1

Water is drawn up through the plat tissue to the leaves in a suction created by the evaporation of water from the leaves.

Answer 2

The process of transpiration draws water from the roots to the leaves.

Transpiration is the process by which moisture is drawn or carried from the roots up to the small pores on the underside leaves of the plant. The water changes to vapor and is released to the atmosphere through these pores called stomata.

As water evaporates through the stomata in the leaves, a negative pressure (also called tension or suction) is created in the leaves and tissues of the xylem. The negative pressure exerts a pulling force that draws water up to the leaves from the roots.