Fig. 3.

Transmission electron micrographs. (a) Anticline and periclinal cell walls between connecting aleurone cells in the des5 mutant. Anticlinal walls consist of middle lamella and primary wall only. (b, c) Anticlinal cell wall between aleurone cells in wt (b) and des5 seeds (c), respectively. (d, e) Stacks of collapsed cell walls between the innermost aleurone cell and starchy endosperm are present in the des5 mutant. Al, aleurone; se, starchy endosperm; acw, aleurone cell wall. Scale bars indicate 2 μm (a, b, d, e) and 5 μm (c, f).