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Primary root elongation of CK44 (A) and B73 (B) oxalate oxidase transgenic (Trans) and wild-type lines after transplanting to well-watered (WW) or water-stressed (WS; –1.6 MPa) conditions. Data are means ± SE (n = 10–32). Asterisks denote significant differences between the transgenic and wild-type lines (t-test; ∗P < 0.05; ∗∗P < 0.01). The experiment was repeated three (CK44) or two (B73) times with similar results.
