Zinc (Zn) is the very essential element in the plant for the activity of the enzymes like carboxylase.
It is absorbed in its ion form Zn++.
Needed in the synthesis of auxin, an essential growth hormone
Plays a role in protein synthesis besides regulation and consumption of sugars
Also essential for starch formation, stalk maturation, root development and for the formation of chlorophyll and carbohydrates
Stunted growth (Causes distortion of growth; Interveinal chlorosis and stunted growth of stems is observed)
Leaves become very small and resettled called as little leaf disease.
Yellowing of mesophyll of leaves
Symptoms appear on older leaves first.