Explain: Translocation of mineral ions.

(N/A) After the ions have reached the xylem through active or passive uptake,or a combination of the two,their further transport up the stem to all parts of the plant occurs through the transpiration stream.
Transport route/pathway:
The chief sinks for the mineral elements are the growing regions of the plant,such as $(1)$ apical meristems,$(2)$ lateral meristems,$(3)$ young leaves,$(4)$ developing flowers,$(5)$ fruits and seeds,and storage organs.
Unloading of mineral ions occurs at the fine vein endings through diffusion and active uptake by these cells.
Mineral ions are frequently remobilized,particularly from older,senescing parts.
Older dying leaves export much of their mineral content to younger leaves.
Similarly,before leaf fall in deciduous plants,minerals are removed to other parts.
Dying leaves $\xrightarrow{\text{mineral elements}}$ New leaves
An analysis of the xylem exudates shows that:
Though some of the nitrogen travels as inorganic ions,much of it is carried in the organic form as amino acids and related compounds.
In addition,a small amount of exchange of materials does take place between xylem and phloem.
Hence,it is not possible to make a clear distinction and say categorically that xylem transports only inorganic nutrients while phloem transports only organic materials.