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Differentiation of shoot is controlled by [2003]
- a)high gibberellin : cytokinin ratio
- b)high auxin : cytokinin ratio
- c)high cytokinin : auxin ratio
- d)high gibberellin : auxin ratio
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Differentiation of shoot is controlled by [2003]a)high gibberellin : c...
Ratio of cytokinins to auxins controls differentiation. If both of these are present in equal quantities, the cells divide but fail to differentiate. If there is more cytokinin than auxin, shoot buds develop. If there is more auxin than cytokinin, roots develop.
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Differentiation of shoot is controlled by [2003]a)high gibberellin : c...
Controlling differentiation of shoot
Introduction:
Differentiation of shoot is the process of development of a shoot from a meristem. It is regulated by various plant hormones like auxins, cytokinins, gibberellins, etc.
Explanation:
The differentiation of shoot is controlled by the ratio of cytokinin to auxin. Higher the cytokinin to auxin ratio, the greater the differentiation of shoots. Cytokinins promote cell division and differentiation, while auxins promote cell elongation and inhibit differentiation. Therefore, a high cytokinin to auxin ratio promotes shoot differentiation.
Gibberellins also play a role in shoot differentiation, but the ratio of gibberellin to auxin or cytokinin is not the primary factor. Gibberellins promote elongation of cells and stem growth, which indirectly affects shoot differentiation.
Conclusion:
In conclusion, the ratio of cytokinin to auxin plays a crucial role in the differentiation of shoots from meristems. A high cytokinin to auxin ratio promotes shoot differentiation, while a high auxin to cytokinin ratio inhibits it.
Introduction:
Differentiation of shoot is the process of development of a shoot from a meristem. It is regulated by various plant hormones like auxins, cytokinins, gibberellins, etc.
Explanation:
The differentiation of shoot is controlled by the ratio of cytokinin to auxin. Higher the cytokinin to auxin ratio, the greater the differentiation of shoots. Cytokinins promote cell division and differentiation, while auxins promote cell elongation and inhibit differentiation. Therefore, a high cytokinin to auxin ratio promotes shoot differentiation.
Gibberellins also play a role in shoot differentiation, but the ratio of gibberellin to auxin or cytokinin is not the primary factor. Gibberellins promote elongation of cells and stem growth, which indirectly affects shoot differentiation.
Conclusion:
In conclusion, the ratio of cytokinin to auxin plays a crucial role in the differentiation of shoots from meristems. A high cytokinin to auxin ratio promotes shoot differentiation, while a high auxin to cytokinin ratio inhibits it.
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