They, too, have thickened cell walls, which are strengthened by incorporating lignin, the fiber that gives strength to wood. These plant tubes are very thin, being made from single cells. Large plants have many of them. They transport water that the leaves release into the air as a byproduct of photosynthesis. On hot days leaves loose a lot of moisture, and must be supplied with enough water to keep them from wilting.
Water has to get up to the top of even the tallest tree.
The height to which water can be raised on your planet will determine the maximum height of your trees. Elizabeth Anne Viau and her licensors. All rights reserved. This material may be used by individuals for instructional purposes but not sold.