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Promoter activities of PME17 and SBT3.5. GUS staining of pPME17:GUS (A, C, E, G, I, K) and pSBT3.5:GUS (B, D, F, H, J, L) are shown for seedlings at different age: 1 d (A, B), 2 d (C, D), 3 d (E, F), 4 d (G, H), 7 d (I, J) and 10 d (K, L). Scale bars: 0·2 mm (A, B), 0·5 mm (C–F), 1 mm (G, H), 2 mm (I, J) and 5 mm (K, L).
