Transmission electron microscopic observations(Fig.5) indicated that while the internal cytoplasmic structure of the cells was disrupted after HPP, it retained some degree of continuity and individual cell components remained identifiable. Cytoplasmic content remained more intact than that seen in many plant cells subjected to HPP (e.g. Vazquez-Gutierrez,Quiles ,Hernando, & Perez –Munuere, 2011;Xu,2007). These differnces may be the result of the high oil and relatively low water content of these cells providing some protection from the damaging effects of high pressure. Despite the micro-structural changes observed, the retention of the overall structure of ripe avocado flesh ( oil contained in discrete units delimited by a swollen cell wall) suggests that a reasonable degree of the structural properties of avocado may be retained after HPP.