Question

What are plant hormones ? Explain the role of auxins to promote the growth of a tendril around a support

Answer 1

plant hormones and phytohormones are the chemical substances which help in the control and coordination of plant

when growing plant detect light a hormone called auxin synthesis at shoot tip help in cell to grow longer. when light is coming from one side of plant then auxin diffused toward shady side of the shoot. thus, the plant appear to be bend.

Answer 2

When the tip of a tendril touches a support , then the auxins present in its tip move to that side of tip which is away from the support . Auxins promote growth . So due to more auxins in it , the side of tendril away from the support grows faster than the side which is in contact with the support and makes the tendril twirl around the support .