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Question

Which plant hormone was first isolated from human urine?


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Solution

Human urine:

  1. Human urine is mainly composed of water.
  2. It consists of urea, creatinine, uric acid, chloride, sodium, potassium, sulfate, ammonium, phosphate, and other ions.

Plant hormone first isolated from human urine:

  1. Kogl and Haagen Smith discovered the first naturally occurring Auxin in human urine.
  2. Auxin is responsible for regulating cell division, plant growth, differentiation, and other physiological processes.
  3. Indole -3- acetic acid (auxin class) was the first plant hormone isolated from human urine.
  4. This hormone helps in the growth of the plant in the tip regions.
  5. Using this hormone, the growth of the shoot in the callus culture can be promoted.

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