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Figure 3


Fig. 3. Vascular patterning defect in Arabidopsis as1 pgy1 leaves. Cross sections through leaf midveins. In wild type (A), as1 (B) and pgy1 (C), xylem is adaxial and phloem is abaxial. In as1 pgy1 mutants (D), xylem is surrounded by phloem. ph, phloem; x, xylem. Scale bars: 50 µm.