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  4. In short day plants, flowering is induced by

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Q. In short day plants, flowering is induced by

AIPMTAIPMT 1992Plant Growth and Development

Solution:

No flowering takes place if the dark period is less than the critical day length. The flowering is inhibited if weak intensity of light is given during the dark period. If the dark period is interrupted mid way by even a single flash of light, no flowering takes place. If this flash is given in the beginning or near the end of the dark phase, they produce flowers.