Effect of Combined Gamma-Irradiation and Storage on Biochemical Changes in Sweet Potato |
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| Authors: | S. AJLOUNI M.K. HAMDY |
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| Affiliation: | Authors Ajlouni and Hamdy are with the Dept. of Food Science and Technology, Univ. of Georgia, Athens, GA 30602. |
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| Abstract: | Sucrose of uncured Red Jewel sweet potato increased from 3.8% to 10.7% after a combined treatment of a 300 Krad dose and 4 days storage at 24°C post-irradiation (PI). Starch decreased from 16.8% to 6.1% after 16 days following a 500 Krad treatment. Phosphorylase, phosphoglucomutase and sucrose phosphate synthase enzyme specific activities increased 2.4-, 1.8- and 1.3-fold, respectively, after 3 days PI following 200 Krad exposures compared to nonirradiated roots. The beta-Amylase, phosphoglucose isomerase and sucrose synthase specific activities increased 1.2-fold. Sucrose synthesis in the irradiated sweet potato was attributed to beta-amylase, phosphorylase, phosphoglucomutase, phosphoglucose isomerase and sucrose synthase. |
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