Question

Callus develops roots if medium is supplied with

• A. Cytokinii
• B. Auxin
• C. Both cytokinin and auxin
• D. More cytokinin and less auxin

Answer 1

Answer: (A)

Cytokinii

Callus is treated with the growth hormones to allow the cell division and differentiation. Callus when treated with the high percentage of auxin and low cytokinin it promotes rooting and when it is treated with the high percentage of cytokinin and less auxin it stimulates cell maturation, differentiation and finally, promotes the development of stem. After formation of the stem, it differentiates into the different vegetative plant. Cytokinin also promotes cell division and maturation. It develops the resistance of plants.

So, the correct answer is option A.