However, the RNAi did not completely knock out the activity of DFR, so the resulting flower still made some of its natural color, and so was a red-tinged blue – a mauve or lavender. If the strategy worked perfectly, in theory, it could produce a truly blue rose. ![]() The researchers then used RNA interference (RNAi) technology to depress all other color production by endogenous genes by blocking a crucial protein in color production, called dihydroflavonol 4-reductase (DFR), and adding a variant of that protein that would not be blocked by the RNAi but that would allow the color of the delphinidin to show. First, the researchers inserted a gene for the blue plant pigment delphinidin cloned from the pansy into a purplish-red Old Garden rose "Cardinal de Richelieu", resulting in a dark burgundy rose. The genetic engineering involved three alterations - adding two genes, and interfering with another. The company and press have described it as a blue rose, but it is lavender or pale mauve in color. Scientists have yet to produce a truly blue colored rose however, after thirteen years of collaborative research by an Australian company, Florigene, and a Japanese company, Suntory, a rose containing the blue pigment delphinidin was created in 2004 by genetic engineering of a white rose. Rosa 'Cardinal de Richelieu' rose, used for the first genetic engineering experiments These blue roses were made by placing a blue dye into the bark of the roots. Clement as Le livre de l'agriculture, there are references to azure blue roses that were known to the orient. In a book entitled Kitāb al-filāḥah written by Ibn al-'Awwām al-Ishbīlī in Arabic in the 12th century, and translated into French by J. Since blue roses do not exist in nature, as roses lack the specific gene that has the ability to produce a "true blue" color, blue roses are traditionally created by dyeing white roses. So-called "blue roses" have been bred by conventional hybridization methods, but the results, such as "Blue Moon", are more accurately described as lilac in color. In 2004, researchers used genetic modification to create roses that contain the blue pigment delphinidin. Blue roses are often used to symbolize mystery or the unattainable, since they do not exist in nature because of genetic limitations. Blue roses created by artificially colouring white roses.Ī blue rose is a flower of the genus Rosa (family Rosaceae) that presents blue-to-violet pigmentation instead of the more common red, white, or yellow.
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