Which is not a physiological effect of auxins?

Development of parthenocarpic fruits

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Prevention of abscission of leaves and fruits

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Reversal of genetic dwarfism

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Cell elongation

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Solution

The correct option is C Reversal of genetic dwarfism

Auxins help to initiate rooting in stem cuttings, promote flowering in pineapples. They prevent fruit and leaf drop at early stages but promote the abscission of older mature leaves and fruits.

Auxins also induce parthenocarpy, e.g., in tomatoes. Bolting is induced by gibberellins which induce sub apical meristem to develop faster. This causes elongation of reduced stem or bolting in case of rosette plants.

So, the correct answer is "option D"

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