Root characteristics of three <i>S. integra</i> varieties exposed to different Pb concentrations for 14 days.

<p>(A) Total root length. (B) Surface area. (C) Root volume. (D) Average diameter. Data points and error bars represent means ± S.D. of three replicates (<i>n</i> = 3). Different letters indicate significant differences (<i>P</i><0.05) across the treatments according to Fisher's LSD test.