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Plant hormones

Explain the major natural plant hormones and explain their respective effects?

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The major natural plant hormones and their respective functions include:

a) Auxins : the best called natural auxin is IAA, or indoleacetic acid: their function includes promoting the plant growth, distension and the cellular differentiation.

b) Gibberellins : perform the action same as that of the auxins (growth and distension), stimulate the flowering and the formation of the fruit and activate the seed germination.

c) Cytokinins : Rises the cellular division rate and together with the auxins help the growth and tissue differentiation, slow the aging of the plant.

d) Ethylene (ethene) : It is a gas which is released by the plants which participates within the process of the growth and has the noteworthy role in the fruit ripening and in the leaf abscission.

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