Question

Explain coordination in plants with the help of suitable examples​

Answer 1

Plants have neither nervous system nor muscles that bring about Movement in animals it. It doesn't mean that plant do not show movement. Plants also show movements. moments that do not involve growth and moment that are due to growth these are the movement in a plant. hormones in plants are called plant hormones or growth regulator this helped in coordination of the plant. incremental triggers such that light water Gravity Chemicals that help in a coordination of the plant. some hormones like growth hormones such that auxin, gibberellin, cytokinin, and also inhibitors that help the plant to more growth like abscisic acid.

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Answer 2

Answer:

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Since plants do not have nervous and muscular system like animals, coordination in plants occurs in response to particular stimuli. Tropism/tropic movement is the term used for the movement or growth of any plant part in response to an external stimulus.

These tropic movements can be of various types like:

Phototropism:

The growth movement in plants in response to light stimulus is known as phototropism. For example, the flower head of a sunflower is positively phototropic as it moves from East to West, along with the movement of the Sun.

Geotropism:

The growth movement in plants in response to the force of gravity is known as geotropism. In geotropism, the roots of the plant always grow downwards, while the shoots always grow upwards, away from the earth.

Chemotropism:

The growth movement in plants in response to chemical stimuli is known as chemotropism. For example, the growth of pollen tube towards the ovule in the ovary (through the stigma and style) is an example of positive chemotropism.

Hydrotropism:

The growth movement in plants in response to water is known as hydrotropism. For example, the roots of some plants grow towards the water source, even when the water source is not present directly below it.

Thigmotropism:

The growth movement in plants in response to a touch stimulus or contact with a solid object is known as thigmotropism. For example, in some plants, the coiling of tendrils occurs when they come in contact with objects for support.