Color-Changing Flowers

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What they say about it

A flower that changes from white to red. Water the petunia with a dilute ethanol solution and it blooms red in 24 hours, for up to a week. Water with regular H20 and all of the new flowers will be white.

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How they say it works

A pathway for anthocyanins--colored small molecules produced by brightly colored flowers--is broken. Scientists design a DNA sequence with a gene expression--one that responds to the presence of a small molecule (for example, dilute ethanol solution)--that results in repair of the broken pathway.

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