Figure 1

Scanning electron micrographs of abaxial leaf surface of WT, and tgg1, tgg2 single and tgg1 tgg2 double mutants of Arabidopsis.

(a,b) WT: the non-stomatal pavement cells showing the characteristic jigsaw puzzle shape. (c,d) tgg1 single mutant: the pavement cells appeared relatively bigger, but showed jigsaw puzzle shape, and the stomatal guard cells appeared bigger (marked by white rectangles). (e,f) tgg2 single mutant: the pavement cells appeared bigger and flattened, showing irregular jigsaw puzzle shape, and the stomatal guard cells also appeared bigger (marked by white rectangles). (g,h) tgg1 tgg2 double mutant: the pavement cells appeared overlapping each other, collapsed at some places, and showed irregular jigsaw puzzle shape, and the stomatal guard cells appeared smaller, closed and sunken (marked by white rectangles). (a–h) (Scale bars, 50 μm).