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. 1976 Jul;58(1):28–32. doi: 10.1104/pp.58.1.28

Carbohydrate and Enzymic Characterization of a High Sucrose Sugary Inbred Line of Sweet Corn 1

Jorge W Gonzales a,2, Ashby M Rhodes a, David B Dickinson a
PMCID: PMC542173  PMID: 16659614

Abstract

Reserve carbohydrates were determined on developing endosperm of a new line of sugary maize (Zea mays L.). Other entries, included for comparative purposes, were Midway (sugary), Funks G4646 (starchy), and Illini X-tra Sweet (shrunken-2). Sucrose in the new line, Illinois 677a, was more than twice that of Midway at most stages of development, and reached a maximum of 40% of dry weight at 18 days after pollination. Appreciable phytoglycogen accumulated in Illinois 677a, reaching 30% or more of dry weight as endosperm tissue matured. Thus, Illinois 677a is a typical sugary maize concerning phytoglycogen content, but it resembles shrunken-2 concerning the extent of sucrose accumulation.

Enhanced sucrose accumulation by Illinois 677a was not accounted for by altered in vitro activities of invertase, sucrose synthase, UDP-glucose pyrophosphorylase, or ADP-glucose pyrophosphorylase. Its normal level of ADP-glucose pyrophosphorylase set Illinois 677a apart from shrunken-2 in which the enzyme was drastically reduced.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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