Abstract
Abstract Two chipping cultivars, Snowden and Monona, with or without Chlorpropham (CIPC) application, were stored in darkness at 10–12 °C and approximately 95% humidity, following the 1997 growing season. Chip color, dry matter, and protein contents were monitored over 30 weeks of storage. Tuber concentrations of sucrose, reducing sugars, and major metabolites, as well as enzymes involved in glycolysis, oxidative pentose phosphate pathway, anaerobic and oxidative respiration were monitored during storage. Respiration, as measured by CO 2 production, was significantly ( P ⩽0.05) suppressed in CIPC-treated tubers. CIPC treatment had no significant ( P >0.05) effect on chip color quality or tuber concentrations of protein, dry matter, sucrose, reducing sugars, or the assayed enzymes and metabolites of glycolysis (phosphofructokinases, NADH, ATP). The metabolite NADPH was higher in untreated tubers, consistent with its role in anabolic biosynthetic pathways involved in sprout production. Concentrations of ethanol and lactate, products of anaerobic respiration, were significantly ( P ⩽0.05) higher in the CIPC-treated Snowden tubers, relative to the untreated tubers.
Published Version
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