Question

Name the growth inhibitors in plants.
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Answer 1

Abscissic acid and ethylene.These hormones are the growth inhibitors in plants.

Abscissic acid : its main role in regulating abscission and dormancy in plants.It is inhibor of plant metabolism.

Ethylene:Ethylene promotes abscission in senescent leaves, perhaps by facilitating the struction of auxin. Its effects extend beyond that of inhibiting growth; in fruit, for example, ethylene is regarded as a ripening hormone. Involved in its action in fruit is another factor, perhaps auxin or another

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Answer 2

Answer:Plant Growth Promoters – They promote cell division, cell enlargement, flowering, fruiting and seed formation. Examples are auxins, gibberellins and cytokinins. Plant Growth Inhibitors – These chemicals inhibit growth and promote dormancy and abscission in plants. An example is an abscisic acid.growth inhibitors of various types have been identified in plants. The best characterized one is abscisic acid, which is chemically related to the cytokinins. It is probably universally distributed in higher plants and has a variety of actions; for example, it promotes abscission (leaf fall), the development of dormancy in buds, and the formation of potato tubers. The mode of action of abscisic acid has not yet been clarified but is thought to involve the direct inhibition of the synthesis of RNA and protein.

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