A Theoretical Model of Jigsaw-Puzzle Pattern Formation by Plant Leaf Epidermal Cells
Fig 3
Effects of decreased cellulose on cell wall thickness.
(a) Transmission electron microscopic images of the cotyledon lateral cell wall in an rsw2/kor1 mutant, in which cellulose production is decreased. The red line shows the thickness of the cell wall. Scale bars = 200 nm. (b) The mean thickness of the cotyledon lateral cell wall in the wild type (Col-0) and rsw2/kor1 mutant plants 7 days after sowing. Data are mean ± SD (n = 5). **p < 0.005 (U-test). Note that thickness increased in the rsw2/kor1 mutant. (c) Transmission electron microscope images of the cotyledon lateral cell wall in wild-type seedlings with or without cellulose treatment. The red line shows the thickness of the cell wall. Scale bars = 200 nm. (d) The mean thickness of the cotyledon lateral cell wall after 7 days in wild type plants (Col-0) with or without cellulase treatment. Data are mean ± SD (n = 6). *p < 0.01 (U-test). Note that thickness was increased by cellulase treatment. (e) A numerical simulation of the model in which the effective range of signaling molecule was changed. The thickness of the cell wall increased by increasing the effective range of action of signaling molecule. (f) Model of cell wall thickness change. A certain point of the cell wall-cytoplasm interface detects the amount of cytoplasm around that point, and its detection range is defined by the kernel diameter (blue circle). The boundary reaches a steady state when the interface speed becomes zero due to the signaling molecule effect from the neighboring cell. If the kernel diameter is larger (red circle), the effect comes from further away and, the steady-state thickness increases as a result.