Showing papers on "Isovitexin published in 1972"
TL;DR: The glycosylation of flavones in the petals of Melandrium album is shown to be controlled by the genes G, X and A; in the presence of the recessive alleles of these genes, only the aglycone isovitexin (6-C-glucosylapigenin) is found in thePetals.
Abstract: The glycosylation of flavones in the petals of Melandrium album is shown to be controlled by the genes G, X and A. In the presence of the recessive alleles of these genes, only the aglycone isovitexin (6-C-glucosylapigenin) is found in the petals. The gene G controls the transfer of glucose, the gene X the transfer of xylose to the 7-hydroxyl group of isovitexin. The gene G is epistatic over X. In the presence of the gene A arabinose is coupled to the carbon-carbon bound glucose of isovitexin. In the presence of both G and A, or both X and A the corresponding di-glycosides are formed.
34 citations
TL;DR: In Briza media and the South American species, ploidy level is shown to play a large part in flavonoid variation, whereas tetraploids accumulate orientin and iso-orientin, autotetraploidy having apparently upset regulatory genes in the formation of the flavone C -glycosides.
32 citations
5 citations
TL;DR: C.d. studies of C-glycosylflavones have shown that a positive Cotton effect at 250–275 nm indicates that the glycosyl residue is linked to C-6 (e.g. isovitexin).
Abstract: C.d. studies of C-glycosylflavones have shown that a positive Cotton effect at 250–275 nm indicates that the glycosyl residue is linked to C-6 (e.g. isovitexin) while a negative Cotton effect at 250–275 nm indicates it is linked to C-8 (e.g. vitexin).
1 citations