Question

Where are the following hormones synthesized in plants

a. IAA

b. Gibberellins

c. Cytokinins

Answer 1

Region of synthesis of IAA:

Indole-3-acetic acid is a natural auxin that is synthesised at the apices of root and shoot. It travels to other parts of the plant through the conducting tissues.

Final answer: Root and shoot apices.

Region of synthesis of gibberellins:

Gibberellins are produced in germinating seedlings, young leaves, buds etc. These are formed in the plastids by the terpenoid pathway and then transformed in the endoplasmic reticulum and cytosol until they attain their matured active form.

Final answer: Germinating seedlings.

Region of synthesis of cytokinins:

Cytokinin is produced in the root sub-apical region and meristematic zones in plants.

Final answer: Meristematic zone.