Red pigment of tomato is formed by

Long effect of auxin

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Short effect of gibberellin

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Delayed effect of phytochrome

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Fast effect of phytochrome

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Solution

The correct option is B Delayed effect of phytochrome
The colour of tomato is red due to the presence of a pigment lycopene. It is a type of carotenoid pigment which is formed as a result of breakdown of chlorophyll. Phytochrome is a chemical which perceives the photoperiodic stimulus in leaves.
A delayed effect of phytochrome causes the breakdown of chlorophyll molecules as light is not absorbed by them. This results in the formation of a red carotenoid lycopene.
So, the correct answer is 'Delayed effect of phytochrome'.

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