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Root meristem activity of the triple mutant. (A and B) One microgram per milliliter 4′,6-diamidino-2-phenylindole staining of root cells of WT (Col) (A) and cre1–12 ahk2–2 ahk3–3 (Col) triple mutant (B). (Bars = 50 μm.) (C) tetraploid (4C/2C) and octaploid (8C/2C) ratios ± standard deviation (n = 4). Open column, WT; filled column, cre1–12 ahk2–2 ahk3–3 mutant.
