The flavonoid glycosides of Dahlia variabilis. III. Glycosides from white varieties.

  title={The flavonoid glycosides of Dahlia variabilis. III. Glycosides from white varieties.},
  author={Cameron Nordstrom and Tony Swain},
  journal={Archives of biochemistry and biophysics},
  volume={73 1},
Unraveling the Biochemical Base of Dahlia Flower Coloration
This work investigated 198 cultivars for the presence of flavonoid enzymes and found that white cultivars were frequently characterized by the lack of DFR activity, whereas in many yellow cultivars neither FHT nor D FR activity could be shown.
Allelic variants from Dahlia variabilis encode flavonoid 3'-hydroxylases with functional differences in chalcone 3-hydroxylase activity.
This is the first identification of an F3'H which is able to catalyze chalcone 3-hydroxylation to a physiologically relevant extent from any plant species.
'Le Rouge et le Noir': A decline in flavone formation correlates with the rare color of black dahlia (Dahlia variabilis hort.) flowers
In the majority of black cultivars this is due to decreased flavone accumulation and thus a lack of competition for flavanones as the common precursors of flavone formation and the anthocyanin pathway, which establishes the black flowering phenotypes.
Flavonoids of the Sunflower Family (Asteraceae)
The Flavonoids as Indicators of the Evolutionary Process and Hybridization and Introgression and Flavonoid Relationships with other Families.
Simultaneous post-transcriptional gene silencing of two different chalcone synthase genes resulting in pure white flowers in the octoploid dahlia
It is concluded that simultaneous siRNA-mediated post-transcriptional gene silencing of redundant CHS genes results in the appearance of pure white color in dahlias.
A bHLH transcription factor, DvIVS, is involved in regulation of anthocyanin synthesis in dahlia (Dahlia variabilis)
Dahlias (Dahlia variabilis) exhibit a wide range of flower colours because of accumulation of anthocyanin and other flavonoids in their ray florets. Two lateral mutants were used that spontaneously
Tobacco streak virus (strain dahlia) suppresses post-transcriptional gene silencing of flavone synthase II in black dahlia cultivars and causes a drastic flower color change
It is proposed that black flower color in dahlia is controlled by two different mechanisms that increase the amount of cyanidin-based anthocyanins: DvFNS PTGS-dependent and -independent mechanisms.
A basic helix-loop-helix transcription factor DvIVS determines flower color intensity in cyanic dahlia cultivars
Results suggested that the genotype of the promoter region in DvIVS is one of the key factors determining the flower color intensity.
Multiple evolution of flavonoid 3′,5′-hydroxylase
F3′5′H has repeatedly evolved from F3′H precursors at least four times in dicotyledonous plants, which allows for the synthesis of delphinidin-based anthocyanins which usually provide the basis for lilac to blue flower colours.
Genetic and Epigenetic Mechanisms Controlling Flower Color and Pattern Diversity in Dahlia
125 Acknowledgements 129