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Histochemical detection of peroxidase activity by TMB staining in lettuce seeds imbibed in water (A, B) or 0.3% SDIC (C–F). (A, C) CAPs. (B, D) RADs. (E) Seed imbibed in 0.3% SDIC for 34h. (F) Endosperm separated from E. (This figure is available in colour at JXB online.)
