Question

How does chemical coordination occurs in plants?
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Answer 1

Answer:

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Explanation:

Plant hormones bring about chemical coordination in plants. They are synthesized away from the site of their action and then are diffused there. 

Different plants hormones are responsible for growth, development and tropic responses. For example, auxin, cytokinins and gibberellins are growth hormones, ethylene is fruit ripening hormone while abscisic acid is growth inhibitory hormone. 

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Answer 2

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❥$\large{\sf{\underline{\underline \blue{Chemical \: coordination \: in \: plants:-}}}}$

The function of control and coordination in plants is performed by hormones. Plant hormone are also called Phytohormones. These hormones coordinate the activities of plants by controlling one or other aspect of growth of the plant.So,the plant growth substances are also called hormones.Three stages of plant growth(cell division, cell differentiation and cell enlargement) as well as dormancy,breaking of dormancy, stomata control,falling of leaves,fruit growth and ripening of fruits is controlled by hormones.

❥$\large{\sf{\underline{\underline \blue{Pythohormones:-}}}}$

1. Auxins-

• promote cell enlargement.

• promote cell differentiation.

• promote fruit growth.

2. Gibberellians-

•promote cell enlargement

•help in breaking dormancy.

•promote fruit growth

3. Cytokinins-

• helps in cell division.

• helps in breaking dormancy.

•promote opening of stomata.

4. ABA-

•promotes wilting and falling of leaves.

•promotes dormancy.

•promotes closing of stomata.