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Increased Production of Nutriments by Genetically Engineered Crops

Business Unit Cell Cybernetics, Plant Research International, Wageningen, THE NETHERLANDS

View larger version (12K): [in a new window]   Fig. 1. Schematic overview of the flavonoid biosynthesis pathway. Boxed are the different flavonoid classes. PAL: phenylalanine-ammonia lyase, CHS: chalcone synthase, CHI: chalcone isomerase, F3H: flavanone-3-hydroxylase, IFS: isoflavone synthase, FNS: flavone synthase, FLS: flavonol synthase, DFR: dihydroflavonol reductase, ANS: anthocyanidin synthase.

View larger version (21K): [in a new window]   Fig. 2. Metabolite analysis of tomato peel (by high performance liquid chromatography). The upper panel shows the chromatogram of untransformed tomato, whereas the lower panel reveals the presence of a high level of flavonols in transgenic tomato.

View larger version (20K): [in a new window]   Fig. 3. Schematic overview of the aspartate family amino acid biosynthesis pathway. Only the major key enzymes are indicated in italics. Curved arrows represent feedback inhibition by the end-product amino acids.

View larger version (37K): [in a new window]   Fig. 4. Lysine concentration in potato tubers of control plants (left group) and transgenic plants (right group) containing a feedback-insensitive dihydrodipicolinate synthase (DHDPS).