Choose the correct answer from the alternatives given.
Which of the following plant hormones is called the stress hormone because it produces dormancy in seeds and buds?

Abscisic acid

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Auxin

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Cytokinin

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Ethylene

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Solution

The correct option is A Abscisic acid
Abscisic acid inhibits seed germination and stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone.
So, the correct option is 'Abscisic acid'.

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