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Which of the following physiological effects is caused in plants by gibberellic acid?

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Shortening of genetically tall plants.

Elongation of genetically dwarf plants.

Rooting in stem cuttings.

Yellowing of young leaves.

answer is B.

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Detailed Solution

Gibberellins promote internodal elongation in genetically dwarf plants like maize, Pisum, Vicia faba etc. Here only phenotype get change while genotype remains same.

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