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Glass Transitions in Soybean Seed: Relevance to Anhydrous Biology

Fabio Bruni and A. Carl Leopold
Plant Physiology
Vol. 96, No. 2 (Jun., 1991), pp. 660-663
Stable URL: http://www.jstor.org/stable/4273654
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Glass Transitions in Soybean Seed: Relevance to Anhydrous Biology
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Abstract

We have investigated the mechanism by which anhydrobiotic organisms can survive severe dehydration. The method used was measurement of the rotational diffusion coefficient of a hydrophilic spin probe, inserted in the cytoplasm of soybean (Glycine max L.) axes, as a function of temperature and sample water content. Results indicate the existence of a hydration-dependent glass-like transition at physiological temperatures. No glass transitions have been observed in desiccation-intolerant samples, suggesting that the ability to withstand dehydration is associated with glass formation.

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