Fig. 4. 4 in 3-O-glycosylation of kaempferol restricts the supply of the benzenoid precursor of ubiquinone (Coenzyme Q) in Arabidopsis thaliana

Fig. 4. 4-hydroxybenzoate content in A. thaliana roots and rosette leaves. Roots were harvested from 17-day-old axenic cultures, while rosette leaves were harvested from 3-week-old plants grown on soil. Samples were processed with and without acidic hydrolysis, and 4-hydroxybenzoate was quantified by HPLCspectrophotometry. Data represent the means of 3–4 biological replicates ± SE. P values from an analysis of variance between the ugt78d1/ugt78d2 knockout and the wild-type reference are indicated above the bars. Threshold for statistically significant differences between ugt78d1/ugt78d2 and wild-type data as determined by variance analysis was P