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Content of Cd in the roots and shoots in Populus ×canescens (Aiton Sm.) genotypes TP11 (a,b) and TP20 (c,d) grown in perlite for 2 or 10 days with or without Cd. Data are presented as the mean ± SD (n = 3). Values followed by the same letter(s) are not significantly different according to Tukey’s test (p < 0.05).
