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Plant Growth and Development
Plant Growth Regulators in Tissue Culture
1 question from 1 paper, each with its answer.
- question
- 1
- paper
- 1
- of Plant Growth and Development
- 1.18%
Concepts tested
- Cytokinin to auxin ratio in organogenesis
All Questions
2003 AIPMT 1 question
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Differentiation of shoot is controlled by : -Skoog and Miller showed in tobacco callus cultures that organ formation depends on the relative amounts of auxin and cytokinin in the medium.
A high cytokinin : auxin ratio promotes the differentiation of shoots (buds).
A high auxin : cytokinin ratio promotes root formation.
Roughly equal amounts keep the callus growing without differentiation.
So differentiation of shoots is controlled by a high cytokinin : auxin ratio.