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Carbohydrate composition and constituents associated with carbohydrates were determined in corn ( Zea mays L.) seedlings subjected to three levels of moisture stress. Stress had no effect on fructose and glucose concentrations, increased sucrose concentration slightly, and decreased starch concentration markedly. Chlorophyll concentration decreased with increasing moisture stress, and chlorophyll a was affected more than chlorophyll b . Sucrose and starch synthesis, measured by 14 C‐glucose incorporation, were not changed by stress. Enzymatic hydrolysis of sucrose decreased and hydrolysis of starch increased during stress. The latter changes were apparently survival adaptations to stress conditions. Maintaining or increasing concentrations of low molecular weight carbohydrates probably helped plants retain turgidity and protected protoplasmic constituents.
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Maranville et al. (1970) studied this question.
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