Fig. 6. Tomographic models showing a solid phragmoplast from a root-meristem cell. (A) Tomographic model with a section depth of 1.2 µm and with the microtubules (green) shown with their actual diameter of 25 nm. (B) Calculated fluorescence image based on the same tomographic model as in A. To produce this image, we increased the diameter of the microtubules to 150 nm (the limit of resolution of fluorescence-microscopy images) and made the microtubules look slightly transparent.