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

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Solution

Auxins:
Auxins are powerful growth hormones, which is naturally produced by plants.
In all higher plants, this plant growth regulator is produced within the tips of roots and stems and in flower buds.
There are different types of auxins, among which Indole acetic acid -IAA is the naturally synthesized and the first plant growth regulator to be discovered.
Auxins are mainly found in all plant tissues and have a wide range of uses in a plant.
It helps in promoting cell division, and elongation of the stem, and inhibits the growth of lateral bud and root growth.
In tendrils, including passionflowers, sweet pea, and grapevine, auxins stimulate the plant cells to grow longer on the opposite side by increasing the concentration.
Therefore, this promotes increased growth in the external parts as compared to the internal parts of the tendrils which result in the formation of coils around the support.

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Question 30.01:

Auxins are growth hormones capable of promoting cell elongation. They have been used in horticulture to promote growth, flowering and rooting. Write a line to explain the meaning of the following terms related to auxins.
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Anti-auxins

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Question 4
How do auxins promote the growth of a tendril around a support?

What are tendrils? How do auxins promote the growth of a tendril around a support? Explain in simple words.

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