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Plant Physiology 48:270-272 (1971)
© 1971 American Society of Plant Biologists

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Articles

Glucose Metabolism of Embryos and Endosperms from Deteriorating Barley and Wheat Seeds

James D. Anderson and Aref A. Abdul-Baki

a United States Department of Agriculture, Agricultural Research Service, Market Quality Research Division, Beltsville, Maryland 20705

Changes in glucose utilization into CO2 and ethanol-insoluble material were followed in whole seeds, embryos, and endosperms of wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) which had reached different levels of deterioration through accelerated aging treatments. Excised embryos from deteriorated wheat seeds had reduced respiration and glucose utilization into ethanol-insoluble material but not into CO2. These treatments had no effect on respiration of excised endosperms, although they reduced utilization of glucose into ethanol-insoluble material and CO2. Changes in metabolic activity of whole seeds in response to deterioration treatments are difficult to interpret because they represent the sum of the changes that take place in the embryos and endosperms. Changes in respiration and glucose utilization in these two tissues neither proceed at the same rate nor go in the same direction during deterioration.

Incubation of excised embryos and endosperms in glucose-14C under N2, as compared to air, affects the utilization but not the uptake of glucose. Embryos produce more 14CO2 and less labeled ethanol-insoluble material under N2 as compared to air. The responses of endosperms to N2 are of a much lower magnitude than those of embryos.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1971 by the American Society of Plant Biologists