Labeling of nonstructural carbohydrates in winter wheat stems
Fructans are polymers of fructose, which contain a terminal or subterminal glucose moiety. The biosynthetic pathway for the levan-type of fructan, found in wheat, has not been elucidated. These compounds are a significant component of the nonstructural carbohydrate fraction in winter wheat stems. They accumulate when photosynthetic production exceeds their utilization. Based on a study of the translocation of 14C-sucrose in winter wheat, Robinson (44) suggested that the fructose moiety of translocated sucrose might be used preferentially for biosynthesis of fructans. The present study tested ...
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