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Metal concentrations in the xylem and phloem saps obtained from rice plants grown in a flooded Cd-contaminated soil. Phloem sap was collected from the leaf sheaths (LS-PS) of the 9th leaves at 10th-leaf stage and the 13th leaves at 14th-leaf stage, and from the uppermost internodes (UI-PS) at early grain-filling. Data are from Yoneyama et al. [55]. ◊: metal concentrations in the xylem sap, Δ: metal concentrations in the phloem sap.
