Plants deficient in elemental nitrogen, often show its effect on the biosynthesis of:

Step-by-step solution

Nitrogen is the essential nutrient element required by plants in the greatest amount. It is absorbed mainly as NO 3 – , though some are also taken up as NO 2 – or NH 4 + . Nitrogen is required by all parts of a plant, particularly the meristematic tissues and the metabolically active cells. Nitrogen is one of the major constituents of proteins, nucleic acids, vitamins and hormones.