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How do auxins promote the growth …

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How do auxins promote the growth of tendril around a support?

Posted by Jhon Yadavanshi 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 5 years, 8 months ago

Auxin increase in concentration in the part of the tendril which is away from the support. This results in increased cell division in that part. The part which is nearer to the support has lesser rate of cell division. As a result, the external part of the tendril grows more than the internal part and the tendril coils around the support.
When the tendril touches a support, auxin moves to the opposite side causing more growth on that side. This makes the tendril twine around the support.

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CBSE > Class 10 > Science