The xylem in plants are responsible for:

transport of water.Xylem is one of the two types and categories of transport tissue in vascular plants, phloem being the other. Together with phloem (tissue that conducts sugars from the leaves to the rest of the plant), xylem is found in all vascular plants. The basic function of xylem is to transport water from roots to shoot & leaves, but it also transports some dissolved nutrients.