Symbiotic organisms, whether mutualistic (Brown and King 1982; Studer et al. 1992) or parasitic (Mendgen and Lesemann 1991), are among the most difficult specimens to prepare for electron microscopy (EM), both transmission electron microscopy (TEM) and scanning electron microscopy (SEM). New instrumental developments and the adaptation of novel preparation protocols have contributed equally to significant progress in the knowledge of submicroscopical functional morphology of ectomycorrhiza. Ectomycorrhizas are an extracellular mutualistic symbiosis between ectomycorrhizal fungi and the roots of woody plants, and are defined as having a fungal mantle and a Hartig net between the epidermal and cortical root cells (Harley and Smith 1983).