Summary
Potato tubers, after storage for 2 months at 0 C, showed a higher initial rate of oxygen uptake (2 to 3 fold) and carbon dioxide output when transferred to 25 C than comparable tubers transferred from storage at 12.8 C. Comparative studies on the effects of oxygen saturation, cyanide, carbon monoxide, anaerobiosis, ethylene chlorhydrin, and wounding were made on tubers from storage at 0 or 12.8 C to determine the nature of the cold-induced respiratory burst.
The oxygen-saturation studies and cyanide and carbon monoxide inhibitor studies on the whole tubers indicated that oxygen uptake by tubers from 0 and 12.8 C storage was mediated by the same terminal oxidase which is presumably cytochrome oxidase. The cold-induced respiratory increment present in tubers from 0 C storage was inhibited by cyanide and carbon monoxide. In contrast, cyanide and carbon monoxide stimulated the basal respiration characteristic of the tubers from 12.8 C storage.
Tubers from storage at 12.8 C, after 24 hours in nitrogen, showed a sharp increase in respiration when transferred to air. Tubers from storage at 0 C, after 24 hours in nitrogen, also showed an increase when transferred to air that was partially additive to the respiratory burst induced by cold storage.
Carbon dioxide output at 25 C by tubers from 0 and 12.8 C storage was increased by treatment with ethylene chlorhydrin and by wounding. The percentage increase was smaller in each case for the tubers from storage at 0 C, indicating that the cold-induced respiratory burst and the respiratory stimulation from treatment with ethylene chlorhydrin and from wounding have, to some degree, a common basis.
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Craft, C.C. Respiration of potatoes as influenced by previous storage temperature. American Potato Journal 40, 289–298 (1963). https://doi.org/10.1007/BF02862778
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DOI: https://doi.org/10.1007/BF02862778