Elsevier

Phytochemistry

Volume 19, Issue 11, 1980, Pages 2305-2309
Phytochemistry

Regulation of starch biosynthesis in normal and opaque-2 maize during endosperm development

https://doi.org/10.1016/S0031-9422(00)91016-1Get rights and content

Abstract

The absolute activities of sucrose-UDP glucosyltransferase, glucose-6-phosphate ketoisomerase and soluble and bound ADPG-starch glucosyltransferase have been studied in normal and Opaque-2 maize endosperms during development. In general, the activities of these enzymes except sucrose-UDP glucosyltransferase were higher up to 20 days post-pollination and lower at the 30 day stage in Opaque-2 than in normal maize endosperms. However, sucrose-UDP glucosyltransferase activity was higher in normal maize endosperm up to the 20 day stage while it was lower at subsequent stages than in Opaque-2. It is suggested that the lower level of these enzymes, except sucrose-UDP glucosyltransferase, might be responsible for the reduced accumulation of starch in Opaque-2 endosperm during later stages of endosperm development.

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Part of M.Sc. Thesis submitted by S. J. to P. G. School, IARI, New Delhi.

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