Water and solute movement in plants:
https://www.ebsco.com/research-starters/anatomy-and-physiolo...
there is a disconnect between the roots and the xylem, its not a throughway, there is a switchover.
Plant Roots and Mineral Nutrition: An Overview of Molecular Basis of Uptake and Regulation, and Strategies to Improve Nutrient Use Efficiency (NUE)
https://link.springer.com/chapter/10.1007/978-981-15-9380-2_...