Figure 9.

Schematic Representation of the Physiological Changes that Occurred in the Roots of the Triple gdh1-2-3 Mutant.

A simplified representation of the main metabolic pathways involved in C and N metabolism is shown. Metabolites detected in lower or higher concentrations in the triple mutant are shown in blue and red, respectively. Dotted lines indicate transport of metabolites. Enzymes are shown in italics in boxes. Enzymes for which gene expression was upregulated in the triple gdh1-2-3 mutant are shown in red, and those that were downregulated are shown in blue. Metabolites underlined exhibit a similar pattern of accumulation in leaves. GAD, Glu decarboxylase; GOGAT, Glu synthase; GS, Glu synthetase; HXK, hexokinase; PDH, pyruvate dehydrogenase; PEPC, phosphoenolpyruvate carboxylase.