Summary
Exposure ofEphestia cautella pupae to hypercarbic atmospheres causes an acumulation of sorbitol in the tissues. This accumulation is maximal at 80% CO2 and decreases at higher concentrations. The reason for this paradoxical behavior is the inhibition by carbon dioxide of the reduction of glyceraldehyde catalyzed by aldose reductase. This inhibition is competitive and is overcome by accumulation of the substrate. It is suggested that the sorbitol pathway might be a bypass of phosphofructokinase, although its efficiency is questionable.
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Conribution from the Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel. No.518-E, 1982 series. This research was supported by a grant from the US-Isael Binational Agricultural Research and Development Fund (BARD).
The authors wish to thank mrs Miriam Rindner and Mr A. Azriely for their dedicated and competent technical assistance, and Mrs Mazal Menacherov for protein determinations.
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Friedlander, A., Navarro, S. Effect of controlled atmospheres on the sorbitol pathway inEphestia cautella (Walker) pupae. Experientia 39, 744–746 (1983). https://doi.org/10.1007/BF01990304
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DOI: https://doi.org/10.1007/BF01990304