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Scientists have unlocked the secret of what makes plants flower. Latest research shows that it is a protein acting as a long-distance signal from leaf to shoot-tip that tells plants when to flower. Researchers uncovered the potential mechanism by which the Arabidopsis plant flowers in response to changes in the length of a day, effectively setting off a long-distance signal to travel through the plant's vascular system from the leaf to the shoot apex. The end result is the flowering of the plant.


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