Which of the following hormone closes stomata in response to water stress?

IAA

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ABA

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NAA

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{GA}_{3}

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Solution

The correct option is B ABA
In guard cells, the plant hormone abscisic acid (ABA) inhibits stomatal opening and induces stomatal closure through the coordinated regulation of ion transport.

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Similar questions

Name the plant hormones which are responsible for the following effects :

(d) closing of stomata

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