● `color{violet}("Plants")` obtain iron in the form of `color{brown}("ferric ions" (Fe^(3+)))`.

● It is required in `color{brown}("larger amounts in")` comparison to other `color{violet}("micronutrients.")`

● It is an important constituent of `color{violet}("proteins")` involved in the transfer of electrons like `color{brown}("ferredoxin and cytochromes.")`

● It is `color{brown}("reversibly oxidised")` from `color{violet}(Fe^(2+)` to `color{violet}(Fe^(3+))` during `color{violet}("electron transfer.")`

● It activates `color{brown}("catalase")` enzyme, and is essential for the `color{violet}("formation of chlorophyll.")`

● It is absorbed in the form of `color{brown}("manganous ions" (Mn^(2+)))`.

● It activates many enzymes involved in `color{violet}("photosynthesis, respiration")` and `color{violet}("nitrogen metabolism.")`

● The best defined function of `color{violet}("manganese")` is in the `color{brown}("splitting of water")` to liberate oxygen during `color{violet}("photosynthesis")`

● `color{violet}("Plants")` obtain zinc as `color{violet}(Zn^(2+))` ions.

● It activates various enzymes, especially `color{brown}("carboxylases.")`

● It is also needed in the `color{violet}("synthesis")` of `color{brown}("auxin.")`

● It is absorbed as `color{brown}("cupric ions" (Cu^(2+)))`.

● It is essential for the `color{brown}("overall metabolism")` in plants.

● Like iron, it is associated with certain `color{violet}("enzymes")` involved in `color{brown}("redox reactions")` and is reversibly oxidised from `color{violet}(Cu^+)` to `color{violet}(Cu^(2+))`.

● It is absorbed as `color{violet}(BO_3^(3−))` or `color{violet}(B_4O_7^(2−))` .

● `color{violet}("Boron")` is required for uptake and utilisation of `color{violet}(Ca^(2+))`, `color{brown}("membrane functioning, pollen germination,")` cell elongation, cell differentiation and `color{violet}("carbohydrate translocation.")`

● `color{violet}("Plants")` obtain it in the form of `color{brown}("molybdate ions")` `color{violet}((MoO )_2^(2+))` .

● It is a component of several enzymes, including `color{brown}("nitrogenase")` and `color{brown}("nitrate reductase")` both of which participate in `color{violet}("nitrogen metabolism.")`

● It is absorbed in the form of `color{brown}("chloride anion" (Cl^–))`.

● Along with `color{violet}(Na^+)` and `color{violet}(K^+)`, it helps in determining the `color{brown}("solute concentration")` and the `color{brown}("anion cation")` balance in cells.

● It is essential for the `color{brown}("water-splitting")` reaction in `color{violet}("photosynthesis,")` a reaction that leads to oxygen evolution.