Multiple choice Where does root pressure develop? Conducting cells of phloem Tracheary elements of xylem Parenchyma cells of xylem Bast fibres Reveal answer Fill a bubble to check yourself B Correct answer Explanation Root pressure develops in the tracheary elements of xylem, i.e. tracheids and vessels. In plants, tracheary elements function as the primary water transport cells for which root pressure is an essential requirement.