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Findings in Cellular Structures Reported from National Center for Scientific Research (CNRS)

June 3, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Data detailed on Cellular Structures have been presented. According to news reporting out of Talence, France, by NewsRx editors, research stated, "Probing the mechanical properties of plant cell wall is crucial to understand tissue dynamics. However, the exact symmetry of the mechanical properties of this anisotropic fiber-reinforced composite remains uncertain."

Our news journalists obtained a quote from the research from National Center for Scientific Research (CNRS), "For this reason, biologically relevant measurements of the stiffness coefficients on individual living cells are a challenge. For this purpose, we have developed the single-cell optoacoustic nanoprobe (SCOPE) technique, which uses laser-generated acoustic waves to probe the stiffness, thickness and viscosity of live single-cell subcompartments. This all-optical technique offers a sub-micrometer lateral resolution, nanometer in-depth resolution, and allows the non-contact measurement of the mechanical properties of live turgid tissues without any assumption of mechanical symmetry. SCOPE experiments reveal that single-cell wall transverse stiffness in the direction perpendicular to the epidermis layer of onion cells is close to that of cellulose. This observation demonstrates that cellulose microfibrils are the main load-bearing structure in this direction, and suggests strong bonding of microfibrils by hemicelluloses. Altogether our measurement of the viscosity at high frequencies suggests that the rheology of the wall is dominated by glass-like dynamics. From a comparison with literature, we attribute this behavior to the influence of the pectin matrix."

According to the news editors, the research concluded: "SCOPE's ability to unravel cell rheology and cell anisotropy defines a new class of experiments to enlighten cell nano-mechanics."

For more information on this research see: Transverse mechanical properties of cell walls of single living plant cells probed by laser-generated acoustic waves. Planta, 2014;239(5):1129-1137. Planta can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer -; Planta -

Our news journalists report that additional information may be obtained by contacting A. Gadalla, CNRS, I2M, UMR 5295, F-33400 Talence, France. Additional authors for this research include T. Dehoux and B. Audoin (see also Cellular Structures).

Keywords for this news article include: France, Europe, Talence, Cell Wall, Cellular Structures

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Source: Life Science Weekly

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