Question

Which one of the following plant growth regulators facilitate adventitious root formation?

• A. Auxin
• B. Zeatin
• C. Dihydrozeatin
• D. Kinetin

Hint:

- Auxins → root initiation.
- Cytokinins → shoot initiation.
- Balance of auxin:cytokinin determines organogenesis.

Answer 1

The Correct Option is A

Step 1: Adventitious root formation is stimulated by auxins, a class of plant hormones.
Step 2: Auxins promote cell elongation and differentiation, especially in root initiation.
Step 3: Cytokinins (e.g., Zeatin, Kinetin, Dihydrozeatin) mainly promote cell division and shoot initiation, not root formation.
Final Answer: Auxin facilitates adventitious root formation.
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