When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are:
1. yellowish leaves
2. colourless petiole
3. dark green leaves
4. shoot apex die.
(1) Magnesium is important constituent of chlorophyll thus it is found in all green plants and is essential for photosynthesis. It also helps in binding of ribosomal particles where protein synthesis occurs.
It is also part of many enzymes of respiration. The deficiency symptoms of magnesium include interveinal chlorosis in leaves and yellowing of leaves starting from basal to younger ones.