Figure 7.

Amino acid metabolism under low-N conditions. In the pathways, changes measured for metabolite concentrations are given as heat maps of log2 fold changes in low- versus high-N-treated maize source leaves, and changes of transcripts of the participating enzymes are given on the right. A, Glu, Gln, Asp, and Asn metabolism. B, Ala metabolism. C, Ser, Gly, and Cys metabolism. D, Arg and Pro metabolism. E, Thr and Lys metabolism. F, Tyr, Phe, and Trp metabolism. G, Val, Leu, and Ile metabolism.