Fig. 8.

Effect of the BrHMA3 promoter on Cd accumulation in Brassica rapa. The shoot/root Cd concentration ratio in the parental lines (GJCGB and Chiifu) and F₁ plants grown in hydroponic culture with 0.1 μM Cd (A); relative expression levels of BrHMA3 in roots and shoots of the parental lines (GJCGB and Chiifu) and F₁ plants (B); the shoot/root Cd concentration ratio in F₂ plants grouped according to BrHMA3 promoter type (C). The numbers of plants with different genotypes are indicated in (C). BrHMA3 promoter genotype: A = GJCGB, B = Chiifu, H = Heterozygous. Data are the means ±SD (n=3 in A and B). Different letters above the bars indicate significant differences at P<0.05 (Tukey’s test).