Scientists have discovered the cellular mechanism for blue petunias
Picture credit: Cell Reports
Pictured above is a blue petunia (left) and a genetically altered petunia lacking the blue-creating molecular mechanism.
LiveScience sums up the research nicely at the link: http://www.livescience.com/42279-rare-blue-flowers-petal-color.html
And for the die-hard nerds, here’s the paper: http://www.cell.com/cell-reports/retrieve/pii/S2211124713007547?_returnURL=http://linkinghub.elsevier.com/retrieve/pii/S2211124713007547?showall=true#Summary