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'Flavonols' in keywords Facet   Publication Year 1986  [X]
Facet   section ZfN Section C  [X]
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1Author    G. Forkm, P. De Vlaming, R. Spribille, H. Wiering, A. W. SchramRequires cookie*
 Title    Genetic and Biochemical Studies on the Conversion of Dihydroflavonols to Flavonols in Flowers of Petunia hybrida  
 Abstract    Soluble enzyme preparations from flower buds of Petunia hybrida catalyzed the conversion of dihydroflavonols to flavonols. Dihydrokaempferol and dihydroquercetin were readily converted to the respective flavonols, whereas dihydromyricetin was a poor substrate. The reaction required 2-oxoglutarate, ascorbate and Fe2+ as cofactors and had a pH optimum at about 6.5. In the presence of the dominant allele FI, high enzyme activity for flavonol formation was found, whereas in enzyme preparations from flower buds of recessive genotypes (fl/fl) only low enzyme activity could be observed. A substantial correlation was found between enzyme activity for flavonol formation and the flavonol content of buds and flowers during development. 
  Reference    Z. Naturforsch. 41c, 179 (1986); received July 27/September 26 1985 
  Published    1986 
  Keywords    birthday Dioxygenase, Flavonoid Biosynthesis, Flavonols, Genetic Control, Petunia hybrida 
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 TEI-XML for    default:Reihe_C/41/ZNC-1986-41c-0179.pdf 
 Identifier    ZNC-1986-41c-0179 
 Volume    41