Explain the translocation of solutes in plants.

(N/A) $\Rightarrow$ Mineral salts are translocated through the xylem along with the ascending stream of water,which is pulled up through the plant by the transpirational pull.
$\Rightarrow$ Analysis of xylem sap confirms the presence of mineral salts within it.
$\Rightarrow$ The use of radioisotopes of mineral elements further substantiates the view that they are transported through the xylem.