Which plant hormone promotes seed, bud dormancy and causes stomatal closure ?

IAA

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Abscisic acid

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Cytokinin

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Solution

The correct option is B Abscisic acid
Abscissic acid is a mildly acidic growth hormone which functions as a general growth inhibits by counteracting other hormones or the reactions mediated by them. ABA induced bud dormancy, seed dormancy, closure of stomata and stoppage of cambial activity.

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Similar questions

Which plant hormone promotes seed dormancy during environmental stress?

Plant Hormone	Functions
1. Auxin	Helps in the growth of plant tissue.
2. Cytokinin	Promotes cell division, delays aging of cells.
3. Ethylene	Inhibits growth and causes wilting of leaves, promoting dormancy of buds.
4. Gibberellin	This is a gaseous hormone that causes the ripening of fruits

Give an example of a plant hormone that promotes (a)Growth (b) dormancy in seeds.

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