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Question

Which amino acid is responsible for Indole acetic acid formation?


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Solution

Tryptophan amino acid is responsible for Indole acetic acid formation or IAA which is also known as Auxin defined as a plant-growth regulating hormone.

IAA(Indole Acetic Acid) or Auxin

  • Auxin or IAA is a crystalline plant hormone that regulates plants' growth and development such as cell division and elongation, tissue differentiation, etc.
  • It does so, by making use of the amino acid it constitutes, i.e., tryptophan.

Tryptophan conversion into IAA

  • Tryptophan is first converted into a compound IPA ( Indole 3- Pyruvate). And then, subsequently into IAA or Indole acetic acid.
  • Thus, leading to a two-step conversion following the Auxin biosynthesis pathway.

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