Figure 3. Percentage of F1 plants that had bolted at approximately 4 wk of age. Approximately 24 plants were included in each treatment group. (A) Comparison of bolting in F1 plants when grown at normal conditions. (B) Comparison of bolting in F1 plants when grown under either normal (-) or stressed (+) conditions. Each treatment group is labeled according to treatment and mutant type, on the horizontal axis.