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Question: Answered & Verified by Expert
In callus culture, roots can be induced by the supply of
BiologyStrategies for Enhancement in Food ProductionJIPMERJIPMER 2010
Options:
  • A auxin
  • B cytokinin
  • C gibberellin
  • D ethylene
Solution:
2340 Upvotes Verified Answer
The correct answer is: auxin
Tissue culture is the technique of maintaining and growing cells, tissue, etc. and the differentiation on artificial medium under aseptic condition.
Callus is a irregular, unorganised and undifferentiated mass of actively dividing cell. Differentiation of callus is under control of two hormones, ie, auxin and cytokinin.
$\begin{array}{l|l}
\hline \text{Development of} & \text{Condition} \\
\hline \text{Root} & \frac{\text { Auxin }}{\text { Cytokinin }}= \text{High} \\
\text{Shoot} & \frac{\text { Auxin }}{\text { Cytokinin }}= \text{Low} \\
\text{Both root and shoot} & \frac{\text { Auxin }}{\text { Cytokinin }}= \text{Intermediate} \\
\hline
\end{array}$

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