Q. In tissue culture, roots can be induced by
A) Lower concentration of cytokinin and higher concentration of auxins
B) Only cytokinin and no auxins
C) No cytokinin and only auxins
D) Higher concentration of cytokinin and lower concentration of auxins
Explanation
In tissue culture, shoot regeneration is promoted by cytokinin, and root generation is promoted by auxin like NAA (Naphthalene Acetic Acid). An excess of auxin promotes root regeneration, whereas that of cytokinin promotes shoot regeneration. Roots regenerate from the lower end of these shoots to give complete plantlets.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.