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Role of Abscisic Acid

Choose the co...

Question

Choose the correct answer from the alternatives given.
Which of the following plant hormones, developing in apical bud, inhibits the growth of lower auxillary buds?

A

Abscisic acid

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B

Auxin

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C

Cytokinin

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D

Ethylene

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Solution

The correct option is B Auxin
In most higher plants, the growing apical bud inhibits the growth of the lateral (axillary) buds, a phenomenon called apical dominance. Removal of shoot tips (decapitation) usually results in the growth of lateral buds.
So, the correct option is 'Auxin'.

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Q. Assertion :Suppression of growth of auxillary buds is called apical dominance. Reason: It is due to effect of downward movement of Auxin from apical region towards the lower side.

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Role of Abscisic Acid

Standard XII Biology

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