Abstract
In order to see if there are any structural damages or modifications of the cell wall ofAvena coleoptiles due to the stretching on an Instron tensile-tester when mechanical properties of the cell wall are measured, we made microscopic observations using cell wall specimens which had been stretched. As far as seen by light microscopic and scanning electron microscopic (SEM) observations there are no appreciable changes in the cell wall, such as breakage, tearing or formation of crack on the surface, due to the stretching which produced 10–30 g stress. It is concluded that stretching of this range causes no artifactitious changes in the wall and hence mechanical properties of the cell wall can be measured by stretching the wall specimen on a tensile-tester.
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