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

(d) closing of stomata

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Solution

The correct answer is: Abscisic acid.

•Abscisic acid is a plant hormone that promotes the closing of stomata.
•This hormone is also considered as the stress hormone which acts upon the guard cells surrounding the stomatal pore.
•Abscisic acid mainly functions as a growth inhibiting hormone.

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