Molecular glitch gives blue petunias their uncommon color

01/2/2014 | LiveScience.com

Rare blue petunias have a molecular defect in their acidity control system, which results in the flowers' unusual color, according to a study in Cell Reports. A previously unknown cellular pump that carries protons across membranes, allowing acid to build up, was found in petunia petals, which are normally red or violet. A genetic defect in that pump can cause less acidity, resulting in the blue petal color, researchers said.

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