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Profile of the oxygen concentration within pea roots. The surface of the root is indicated by 0 and the center of the root is indicated by 0.5 of relative diameter. The measurements were performed on nontreated roots (control, white circles) after 1 d of incubation in a hypoxic nutrient solution (white squares) or after 1 d of incubation in a well-aerated nutrient solution supplemented with 8 mm pyruvate (black circles). Mean ± se (n = 7–15).
