Table 4.
Significant correlations between glycolytic pathway metabolites, ATP:ADP ratio, NADH:NAD+ ratio, and respiration rate (RESP) in roots during 60 days storage.
| Metabolite | Positive correlations | Negative correlations |
|---|---|---|
| Sucrose | RESP | NADH:NAD+ |
| Fructose | Pyr | UDP |
| Glucose | NADH, NADH:NAD+ | RESP |
| UDPG | – | – |
| F6P | – | ATP:ADP |
| G6P | ADP, UTP | Pyr |
| G1P | trioseP | – |
| F1,6P | – | – |
| trioseP | G1P | – |
| PEP | – | – |
| Pyr | Fructose | G6P, UDP |
| UDP | – | Fructose, Pyr, NAD+ |
| UTP | G6P, ADP, ATP | – |
| ADP | G6P, UTP, ATP | – |
| ATP | UTP, ADP | – |
| ATP:ADP | – | F6P |
| NADH | Glucose, NADH:NAD+ | – |
| NAD+ | RESP | UDP |
| NADH:NAD+ | Glucose, NADH | Sucrose, RESP |
| RESP | Sucrose, NAD+ | Glucose, NADH:NAD+ |
Roots were stored 10 days at 10°C and 90 ± 5% RH, then stored at 4°C, 90 ± 5% RH for an additional 50 days. Abbreviations used for metabolites are defined in Table 3. ATP:ADP ratio is used as a measure of cellular energy status. NADH:NAD+ ratio is used as a measure of cellular redox status. – is used to denote the absence of any significant correlations, with α = 0.05. Correlation coefficients and P-values are available in Supplementary Table S4.