It forms complexes or chelates with organic radicals.
It is part of the hemoproteins and the proteins of the Fe-S group. It is involved in the biosynthesis of cytochromes, some coenzymes, and chlorophyll, which is derived from a protoporphyrin.
Deficiency – Reduction in plant growth and uniform yellow color, starting at the base of the leaves and continuing to the apex, new leaves and eventually the intermediate leaves are characteristic symptoms of iron deficiency.