Figure 5.

Ideal model for Del and Cy elimination from white onion bulbs. (a) Loss of Del from white onion bulbs. In cases when DFR is suppressed, substrates used for Del synthesis become available for synthesis of Kaempferol and myricetin. (b) Ideal model for the loss of Cy from white onion bulbs. The fluxe due to Cy metabolism is limited in this case, and downstream reactions promote the turnover and degradation of this pigment in the white onion bulbs. The global output from the minimal anthocyanin subnetwork in onion was considered to be 100% and defined the relative content on each product. The dark grey and light green boxes on this figure denote the relative content of genes or compounds in the dark-red and white onion bulbs, respectively. Abbreviations: LAR: leucoanthocyanidin reductase; ANR: anthocyandin reductase. All other abbreviations as in Fig. 1.