Enhanced Heavy Metal Tolerance and Accumulation by Transgenic Sugar Beets Expressing Streptococcus thermophilus StGCS-GS in the Presence of Cd, Zn and Cu Alone or in Combination
Fig 3
Comparative analysis of the root length and fresh weight of transgenic lines under heavy metal stress.
Root lengths (a, c and e) and fresh weights (b, d and f) of transgenic sugar beets overexpressing StGCS-GS (s2, s4 and s5) and wild-type sugar beets (wt) were measured after 3 weeks of treatment with 0, 50, 100 or 200 μM Cd2+, Zn2+ or Cu2+. The experiments were performed in triplicate, and the values are presented as the means ± SD. Means denoted by the same italicized letter did not differ significantly (P<0.05).