The xylem transports water and minerals from the roots up the plant stem and into the leaves. In a mature flowering plant or tree, most of the cells that make up the xylem are specialised cells ...

As water travels through the xylem in the stem and leaf, it is being replaced by water taken up by the roots. Temperature Increases An increase in temperature increases evaporation, so the rate of ...

This difference was especially pronounced in the stem, where the transgenic plants ... cell number per internode (C) number of xylem fibers, and (D) xylem fiber length. GA 20-oxidase appears ...