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
Deficiency symptoms
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Stunted growth (Causes distortion of growth; Interveinal chlorosis and stunted growth of stems is observed)
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Leaves become very small and resettled called as little leaf disease.
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Yellowing of mesophyll of leaves
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Symptoms appear on older leaves first.