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Promoter GUS reporter gene analysis of 4CL gene expression. A, Ten-day-old seeding. B, Root tip of 10-d-old seeding. C, Three-week-old rosette. D, Cross section of 5-week-old inflorescence stem. E, Flower on a 5-week-old plant. Scale bars = 2 mm (A, D, and E); and 100 µm (B and D).
