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Histochemical analysis of p558 transgenic moss plants cultured without or with CuSO4. Transgenic moss plants precultured with 0.2 μm CuSO4 for 7 d were treated without (A and C) or with (B and D) 2.0 μm CuSO4 for 3 d. More than six independent transgenic moss plant lines were investigated. A and B, Protonema cells; C and D, gametophore. Scale bars, 1 mm.
