Zinc and Molybdenum

Zinc and Molybdenum:


Zinc is included in the synthesis of indole acetic acid by activating the enzyme tryptophan synthetase. This plays a significant role in protein synthesis. This behaves as an activator of many other enzymes like alcohol dehydrogenase, carbonic anhydrase, hexokinase and so forth.

Deficiency symptoms:

a. It causes distortion of growth.
b. Leaves become very small and resettled termed as little leaf disease.
c. Interveinal chlorosis and stunted expansion of stems is seen.


Molybdenum has a significant role to play in the metabolism of nitrogen. This affects the synthesis of ascorbic acid. It activates the enzymes included in nitrogen metabolism.

Deficiency symptoms:

a. This leads to wilting and mottling of leaves at the margins causing "yellow spot" disease of Citrus.
b. "Whiptail" disease in cauliflowers causing narrowing of leaf blades and their rugged appearance due to deformation.

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