PLANTS - Le Rouge et le Noir: Where the black dahlia gets its color

The molecular mechanisms whereby a spectrum of dahlias, from white to yellow to red to purple, get their color are already well known, but the black dahlia has hitherto remained a mystery. Now, a study reveals for the first time that the distinctive black-red coloring is based on an increased accumulation of anthocyanins as a result of drastically reduced concentrations of flavones.

http://feeds.sciencedaily.com/~r/sciencedaily/plants_animals/~3/8cYhY3_qjOk/121122195447.htm

http://www.sciencedaily.com/releases/2012/11/121122195447.htm