Abstract
The micromechanics of individual potato cells comprising of cell wall and embedded native or gelatinised starch were explored. Micromanipulation can be used to compare cells of distinct strengths and study (bio)mechanical issues related to industrial processing (e.g. heat treatment). Two commercial types of potato, ‘baking’ and ‘Maris Piper’ were selected to conduct microcompression experiments. Cells isolated from ‘Maris Piper’ raw tubers appeared to be more resistant to deformation than the respective ones from the ‘baking’ cultivar. Cooked cells suffered a decrease in their turgidity which resulted in clusters of observed behaviours, with force–deformation curves showing a single or multiple bursting events. This study provides fundamental work and an insight on the behaviour of potato cells via an exploratory investigation of how different elements of the potato tissue can be measured. The results obtained can be used to relate cellular biology to mechanical properties and could also pave the way to understanding other starch-containing cells (e.g. pea, lentils, wheat).
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