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Coleoptile lengths (A) and fresh weights (B) of rice seeds germinated in normoxic (aerated), hypoxic (3% O2), and anoxic (N2) solution. Coleoptiles (30–40) were collected from each treatment 2, 3, 4, and 5 d after imbibition. Lengths and fresh weights were determined. By 3 d after imbibition the coleoptiles of the normoxic seeds had begun to senesce. Length measurements were therefore halted at 3 d after imbibition in normoxic coleoptiles. Data are mean and SEM (n ≥3).
