Abstract
Corn embryos contain oils with two melting points and a strong tendency to form glasses at temperatures down to −95° When these were extracted, water : sugar glasses can also be detected, with the water serving as a plasticizer. When the water content drops below about 12% (the water content required for seed storage stability) the transition temperature of these water glasses rises above ambient. These data are consistent with our hypothesis that the dormant state in these seeds is a glassy state.
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