- Explain how auxins promote the growth of a tendril around support.
- How Do Auxins Promote The Growth Of A Tendril
- How do auxins promote the growth of a tendril around a support?
- How do Auxins affect root growth?
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Explain how auxins promote the growth of a tendril around support.
Auxin: • Auxins are plant hormones that play an important role in the growth and various processes in plant development and the life cycle of plants. • It is synthesized mainly at the tip of the shoot. • Whenever a new tendril comes, auxins promote the growth of tendril cells so that they can coil around the support. Role of auxin in plants • Auxins play an important role in stem and root cell elongation. • They also play a minor role in flowering. • They help in promoting cell division. • They play a role in the parthenogenesis of fruits. • They also stimulate respiration and increase the storage of solute inside the cells.
How Do Auxins Promote The Growth Of A Tendril
Auxins are the plant hormones present at the tip of tendrils.Growth of tendrils slow down if they are attached around any support because auxins are sensitive to touch. This makes them move to the other side of the tip to get support and results in making the other side grow faster than the side of tendril in contact with the support and the tendril bends towards the support. NCERT solutions of related questions for Control and Coordination • What is the difference between a reflex action and walking? • What happens at the synapse between two neurons? • Which part of the brain maintains posture and equilibrium of the body? • How do we detect the smell of an agarbatti (incense stick)? • What is the role of the brain in reflex action? • What are plant hormones? • How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light? • Give an example of a plant hormone that promotes growth. • Design an experiment to demonstrate hydrotropism. • How does chemical coordination take place in animals? • Why is the use of iodised salt advisable? • How does our body respond when adrenaline is secreted into the blood? • Why are some patients of diabetes treated by giving injections of insulin?
How do auxins promote the growth of a tendril around a support?
When the tip of tendril touches support, then auxin of that side of the tip is moving away from the side of the support. As we know, auxin promotes growth. So, due to the presence of more auxin in it, the side of tendril away from the support grow longer and faster than the support side. And due to thistype of growth, it makes the tendrils bend around the support.
How do Auxins affect root growth?
Auxins: • Auxins are plant growth hormones that lead to the growth of meristematic tissues. • Auxins lead to the initiation of root growth. • They also help in lateral elongation of roots and pre-existing roots. • They also play a role in the development of adventitious roots (roots from non-root tissue). • Hence, as auxins from the roots to the stem, they lead to overall growth.
