Which one of the following synthetic growth regulators is used to promote synchronized flowering in pineapple?

Indolebutyric acid

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2-chloroethylphosphonic acid

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Benzyl aminopurine

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Phenylmercuric acetate

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Solution

The correct option is B Indolebutyric acid
A. Indolebutyric acid is a natural form of auxin which is used to induce flowering in many plants like Pineapple.
B. 2-chloroethylphosphonic acid, also known as Ethepon is used for ripening of fruits as it releases ethylene.
C. Benzyl aminopurine is a synthetic cytokinin used to promote plant growth and flowering.
D. Phenylmercuric acetate is an organic compound that inhibits transpiration i.e. it is an antitranspirant.
So, the correct answer is 'Indolebutyric acid'.

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Auxins are growth hormones capable of promoting cell elongation. They have been used in horticulture to promote growth, flowering and rooting. Write a line to explain the meaning of the following terms related to auxins.
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Synthetic auxins

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