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Plant Hormones

Leaf abscissi...

Question

Leaf abscission, fruit fall, bud dormancy occurs by which phytohormone?

A

Auxin

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B

Cytokinin

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C

Gibberellins

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D

Abscisic acid

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Solution

The correct option is D Abscisic acid
ABA is a phytohormone which causes abscission in plants. Leaf fall, fruit wall, bud dormancy will be induced by ABA. It also promotes delayed flowering and promotes aging.

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Reason: Auxins promote the abscission of older mature leaves and fruits.

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