Figure 5. Growth (a) and peroxidase activity (b) in different hairy root clones grown in hormone free MS liquid medium and in MS with either IAA or NAA at either 0.1 mg L^-1 or 1.0 mg L^-1 observed on 20^th day of culture period. The data is the average of 5 replicates of two independent experiments and the bars indicate SE of mean values.