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The axr1 phenotype. (A) Simulation model. Compared to the WT (Fig. 3E), auxin concentrations and bud activation increase, but PIN levels are unaffected. (B) Auxin mass (pg) exported from the basal end of 2 cm stem segments excised from the apical and basal region of the bolting stems of glasshouse-grown WT (Col) and axr1–3 mutant (axr1) Arabidopsis plants. Error bars: SEM, n ≥ 4.
