The influence of pulsed, electric field (PEF) electroplasmolysis on compressibility of apple tissue were investigated as a function of the tissue plasmolysis degree. It has been established that PEF treatment increases apple tissue porosity from 63 to 69% and from 67 to 75% in dependency of apple variety. Sizes of the PEF induced pores were comparable with the cell wall thickness. The analysis of changes in structural and mechanical properties of the samples after PEF treatment allowed to make conclusion that electroplasmolysis affects not only biological membranes but also cell wall integrity of tissue. Significant reduction in tissue elastic modulus even at low plasmolysis degree (about 25 - 30%) has been explained in the term of synergy between pressure and PEF.
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