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Analysis of bir1-1 root apical meristem defects. Representative samples of mS-PI-stained 7-dag root apical meristems of (A) Col, (B) bir1-1 (long), (C) bir1-1 (medium) and (short), (D) bak1-3, (E) bak1-4, (F) bak1-5, (G) bak1-3; bir1-1, (H) bak1-4; bir1-1, and (I) bak1-5; bir1-1. Scale bar, 50 µm. Arrowhead indicates beginning of elongation zone.
