Expression of the uidA gene in transgenic Arabidopsis leaves. A. Relative uidA mRNA levels. B. Specific GUS enzyme activity. Each bar represents a transformed plant line in A and B. Lines from left to right-G1-1: 113, 117, 118, G1-3: 131, 132, 134, 35 S: 1, 2, 7. The black bars represent the average of the plant lines for each construct. GUS specific activity and uidA mRNA levels were measured using three plants for each line, and the mean and standard error are shown. C. Specific GUS enzyme activity/unit uidA mRNA. Average GUS activity of each construct was divided by its corresponding mRNA level for each DNA construct.