Fig. 6. Effects of mutations in SCAR and ARP2/3 complex subunits on cotyledon pavement cell shapes. (A) Columbia wild type; (B) arp2 (wurm) mutant; (C) arpc5 (crk) mutant; (D) sra1 (pir) mutant; (E) brk1-1 mutant; (F) arp2;brk1-1 double mutant; (G) arpc5;brk1-2 double mutant. Arrows and arrowheads indicate intercellular gaps adjacent to stomata and at other locations, respectively. Scale bar: 100 µm. (H) Form factors are shown for each genotype analyzed (n=3-8 plants and 63-317 cells). Error bars illustrate s.e.m. (where n=number of plants analyzed).