Figure 2.

Stomatal lineage cells have abnormal division planes in o1. The region of developing leaf 4 undergoing stomatal divisions was dissected, fixed, and stained with PI (red) and aniline blue (blue). Segregating wild-type (WT; A, B) and homozygous sibling o1-N1242A mutants (o1;B, D) are shown. White arrowheads mark correct divisions; yellow arrowheads mark incorrect divisions. A, B) Recently formed GMCs. C, D) Recently formed subsidiary cells, formed from SMCs. Z-projection of 3 confocal images. Scale bar, 5 µm.