Variation von Glycerin,Sorbit und anderen Metabolitgehalten infolge von Temperaturstress bei Larven von Callitroga macellaria

Sorbitol, sorbitol phosphate, glycerol, α-glycerol phosphate, lactic and pyruvic acid were determined after storing of non-feeding Callitroga larvae hot or cold. Compared with controls, the high levels of pyruvic acid and lactic acid indicate the increase of anaerobic metabolism by temperature stress. At the same time glycerol increased about threefold, sorbitol increased about seventeenfold after heating and about thirty-fourfold after cooling. The level of glycerol phosphate is lowered after heating and after cooling. Sorbitol phosphate shows after heating a trend to decrease. Heat causes a great standard error.Based on this and other facts it is supposed that different kinds of stress result in a lack of metabolic energy. Thus the pathway of glucose phosphate to direct oxidation and formation of triose phosphate by the pentose phosphate cycle is energetically favoured because the phosphorylation of hexose phosphate to hexose diphosphate is avoided. Triose phosphate can enter the glycolytic pathway. The reduced coenzyme nicotinamide adenine dinucleotide phosphate (NADPH) is generated by the formation of polyols (or polyolphosphates).