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Expression pattern of pArathEULS3::GUS in Arabidopsis thaliana seedlings. (A) 1-day-old seedlings show no expression, (B–D) GUS staining in the root-hypocotyl transition zone and root cap of 3-day-old seedling, (E–M) high expression in the roots of 8-day-old plants. Panels F–M show successive selected parts moving down the same root. GUS staining was carried out for 18 h. Scale bars represent 0.1 mm for images C, D and E–M, 1 mm for A, B, E.
