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Glycolysis of carrot shreds increased under low O2 atmosphere.

Kato-Noguchi, H.; Watada, A. E.; Qi Ling;

Acta Horticulturae Year: 1998 Issue: No. 464 Pages: 243-247 Ref: 11 ref.

1998

บทคัดย่อ

Glycolysis of carrot shreds increased under low O2 atmosphere.

Experiments with carrot shreds held at different 02 concentrations indicated that the respiratory quotient (RQ) breakpoint occurred at about 1% O2. At slightly below the RQ breakpoint (0.5% O2), glycolysis was affected. The low O2 atmosphere caused a sharp increase in fructose 1,6-bisphosphate (Fru-1,6-P2) and a slight decrease in fructose 6-phosphate (Fru-6-P), phosphoenolpyruvate and pyruvate among the glycolytic intermediates. The low O2 also caused an increase in fructose 2,6-biphosphate (Fru-2,6-P2) and ethanol. Fru-2,6-P2 appeared to have promoted glycolysis, as noted by the increased activity of phosphate-dependent fructokinase. ATP level decreased under low O2, but a sufficient level is thought to have been maintained for minimum metabolism by the increased glycolytic activity.