Describe two important functions of each of the element

Describe two important functions of each of the element P, Fe and Zn in green plants. Mention deficiency symptoms of any two of these elements.

(i) Phosphorus ยง It forms the constituent of cell membrane protein, nucleic acids, nucleotides, ATP, NADP and energy rich compounds.
Deficiency symptoms It causes poor growth, leaves become dull green and chlorosis occurs.
(ii) Iron (Fe) It helps in chlorophyll synthesis, cytochrome synthesis, ferredoxin synthesis, activates enzyme and activates catalase.
Deficiency symptoms It result in chlorosis.
{iii} Zinc (Zn) It activates enzyme synthesis. It is a constituent of carbonic anhydrase. This is " also a constituent of dehydrogenase.
Deficiency symptoms Leaves are not properly formed.