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Mineral Nutrition
Role of Zinc
1 question from 1 paper, each with its answer.
- question
- 1
- paper
- 1
- of Mineral Nutrition
- 1.59%
Concepts tested
- Zinc needed for auxin synthesis
All Questions
2003 AIPMT 1 question
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Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone -Zinc is needed for the synthesis of the amino acid tryptophan, which is the precursor of the auxin indole-3-acetic acid (IAA).
So zinc deficiency reduces auxin production. This causes stunted growth with short internodes and small leaves ('little leaf' and rosette diseases).
Zinc also activates enzymes such as carboxylases and alcohol dehydrogenase.
So zinc deficiency affects the biosynthesis of auxin.