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Effect of irradiation on the carbohydrate metabolism responsible for sucrose accumulation in potatoes

Journal Article · · J. Agric. Food Chem.; (United States)
DOI:https://doi.org/10.1021/jf00061a004· OSTI ID:6829098
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The aim of this work was to investigate the effect of ..gamma..-irradiation on the carbohydrate metabolism relating to the accumulation of sucrose in irradiated potato tissues. (/sup 14/C)Sucrose, UDP-glucose, fructose, or fructose 6-phosphate was administered to tissues followed by incubation for 10 h at 20 /sup 0/C, and then the distribution of /sup 14/C was determined. Irradiation restricted the breakdown of sucrose and accelerated its synthesis especially from UDP-glucose and fructose 6-phosphate. It was suggested that sucrose-phosphate synthase with an enhanced activity played an important role in the sucrose accumulation in irradiated potatoes. The radioactivity of CO/sub 2/ was higher and that of water-insoluble substances was lower in irradiated tissues as compared with unirradiated ones. The effect of irradiation could not be observed in tissues pretreated with cycloheximide, which indicated the synthesis of protein was responsible for these phenomena.
Research Organization:
National Food Research Institute, Yatabe, Japan
OSTI ID:
6829098
Journal Information:
J. Agric. Food Chem.; (United States), Journal Name: J. Agric. Food Chem.; (United States) Vol. 33:1; ISSN JAFCA
Country of Publication:
United States
Language:
English

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Related Subjects

550501 -- Metabolism-- Tracer Techniques
560140* -- Radiation Effects on Plants
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
BIOSYNTHESIS
BODY
CARBOHYDRATES
CARBON 14 COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
DISACCHARIDES
ELECTROMAGNETIC RADIATION
ENZYME ACTIVITY
FOOD
GAMMA RADIATION
IONIZING RADIATIONS
IRRADIATION
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
METABOLISM
OLIGOSACCHARIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANT TISSUES
PLANTS
POTATOES
PRESERVATION
PROTEINS
RADIATION EFFECTS
RADIATIONS
RADIOPRESERVATION
SACCHARIDES
SACCHAROSE
SYNTHESIS
TISSUES
TRACER TECHNIQUES
TUBERS
VEGETABLES