FIGURE 2.
Transmission electron microscopy (TEM) micrograph (A) of cell periphery and primary cell wall of M. denticulata with highlighted measurement sites of EEL spectra (scale bar is 1 μm). (B) EEL spectra acquired at the Ca L2,3-edge, indicating calcium binding capacities of different cell components after doping with calcium acetate. Outer side of primary wall (green) has higher calcium binding capacity than inner side (red). Mucilage vesicle (blue) reveal highest calcium binding capacity, the cytoplasm (orange) lowest. Reprinted with permission from Eder and Lütz-Meindl (2008), Copyright© 2008 Royal Microscopical Society.