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  4. Apical dominance is caused by

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Q. Apical dominance is caused by

AIPMTAIPMT 1992Plant Growth and Development

Solution:

According to Thimann and co-workers, auxin is responsible for the dominance of apical bud. The apical dominance is due to interaction between auxin and cytokinin. If the auxin concentration is higher than cytokinin, the apical bud will dominate the growth.