Figure 6.

Comparative responses of the combined isozymic mRNA levels of genes encoding isozymes of the closely related Trp (A, C, and E) and Phe and Tyr (B, D, and F) pathways to various stress conditions. A and B, Drought stress. C and D, Cold stress. E and F, Wounding stress. The combined isozymic mRNA levels of genes encoding biosynthetic/allosteric enzymes, biosynthetic/nonallosteric enzymes, and enzymes catalyzing the first catabolic steps of the amino acids are indicated by blue, black, and red lines, respectively. The names of the enzymes encoded by the different isozymic genes, as provided in Table I, are given in the boxes in A (for A, C, and E) and in B (for B, D, and F). The changes in mRNA levels are given in log₂ ratios of treatments versus controls (y axes on the left). Only values greater than 2-fold increased or 2-fold decreased in mRNA levels (broken horizontal lines) were considered to be significant changes.