Figure 1.

Brassinolide (BL) effect on the adventitious root growth of potatoes. (a) Phenotype of 20-day-old plants from left to right control (0 μg/L) and treated with 0.01, 0.1, 1, 10, and 100 μg/L BL. (b) Root-length measurements of various concentrations (μg/L) of BL-treated plants compared with that of the control. Values represent the mean of 43 measurements ± SD. (c) Adventitious roots numbers in BL-treated plantlets at different concentrations (μg/L) compared with that of control. Values represent the mean of 24 measurements ± SD. (d) Root activity of BL-treated plants at different concentrations (μg/L) compared with that of the control. Values represent mean ± SD of three biological replicates; asterisks indicate significant differences from the control: ∗ and ∗∗ indicate significance at 0.05 and 0.01, respectively.