[Study of degradation of flavonols in the mutants of poppy (Papaver somniferum L.)].
We studied flavonol-degrading activity of cell-free extracts from petals of the flower color and structure mutants. The relationship between degradation of flavonols (kaempferol, quercetin, and myricetin) and biosynthesis of anthocyanins has been revealed. The highest flavonol-degrading activity has been revealed in white flower mutants towards all substrates, particularly, quercetin. The mutations inhibiting synthesis of an anthocyanin pelargonidin provide for synthesis of various quantities of cyanidin in the petals. The flavonol-degrading activity considerably increases with the content of cyanidin. A similar relationship has been revealed in the mutants synthesizing both cyanidin and pelargonidin. The plants accumulating considerable quantities of pelargonidin in their petals have accordingly higher flavonol-degrading activity and predominantly hydrolyze kaempferol. The plants forming additional pods in their flower (pistillody) have higher flavonol-degrading activity as compared to the anther-in-petal and doubleness mutants.
Rat'kin
A V
AV
Vavilov Institute of General Genetics, Russian Academy Sciences, ul. Gubkina 3, Moscow, 119991 Russia.
Evdokimova
L I
LI
Zhanaeva
T A
TA
D000872:Anthocyanins / Q000096:biosynthesis / Q000378:metabolism; D002854:Chromatography, Paper; D044948:Flavonols / Q000096:biosynthesis / Q000378:metabolism*; D035264:Flowers / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D009154:Mutation; D010207:Papaver / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D010858:Pigmentation / Q000235:genetics; D010936:Plant Extracts / Q000378:metabolism; D013053:Spectrophotometry
D000872:Anthocyanins; D044948:Flavonols; D010936:Plant Extracts