Table 2.
Results of ordinary least square (OLS) regression models tested using different subsets of data (metabolites, cyanogenic compounds, enzymes, sugars and organic acids, and ROS-scavenging enzymes)
| Dependent variable: PPD scores | ||||||
|---|---|---|---|---|---|---|
| Metabolites | Cyanogenics | Enzymes | Sugar + Acids | ROSa | All data | |
| OLS regression models | ||||||
| Constant | 2.2 (20.5) |
13.9 (51.7) |
−13.2 (28.3) |
92.9*** (19.2) |
−16.8 (15.4) |
−191.1 (221.9) |
| Phenolics | −0.1** (0.04) |
−0.1 (0.1) |
||||
| Flavonoids | 0.04** (0.01) |
0.01 (0.03) |
||||
| Carotenoids | 0.3 (3.9) |
−1.9 (5.1) |
||||
| Anthocyanins | 0.4 (0.7) |
0.9 (1.5) |
||||
| Scopoletin | 0.2 (0.1) |
0.4 (0.4) |
||||
| Total cyanide | 16,723.7 (14,490.4) |
20,536.5* (11,608.2) |
||||
| AcetoneCyano | −16,721.6 (14,489.8) |
−20,516.5* (11,607.2) |
||||
| Linamarin | −16,723.2 (14,490.3) |
−20,535.1* (11,608.2) |
||||
| Linamarase | −0.3 (5.8) |
12.6 (24.7) |
||||
| Polyphenol | 1.5 (5.1) |
−18.9 (20.8) |
||||
| Ascorbic | 10.2* (5.2) |
8.4 (11.7) |
||||
| Ascorbate | −0.1 (0.2) |
−0.7 (0.9) |
||||
| Guaiacol | 16.2*** (4.0) |
11.7 (14.7) |
||||
| Tocopherol | −0.5 (3.3) |
5.1 (6.4) |
||||
| Proteins | 0.3 (0.2) |
1.0 (1.3) |
||||
| Malic acid | 18.7 (18.2) |
20.5 (53.7) |
||||
| Succinic acid | −6.9 (5.7) |
−20.7 (14.0) |
||||
| FumaricAcid | −0.1 (3.1) |
4.8 (13.0) |
||||
| Raffinose | −15.7** (7.5) |
40.2 (35.5) |
||||
| Sucrose | −2.4** (1.0) |
−4.1** (1.8) |
||||
| Glucose | −4.0*** (1.3) |
−2.6 (5.3) |
||||
| Fructose | −0.3 (1.2) |
−2.2 (5.1) |
||||
| Total sugars | 2.3** (0.9) |
1.8* (1.0) |
||||
| Hydrogen peroxide | 0.4*** (0.1) |
−0.1 (0.4) |
||||
| Catalase | 0.1 (0.1) |
0.4 (0.2) |
||||
| Total SOD | −56.7 (70.3) |
100.8 (154.5) |
||||
| MnSOD | −3.6 (53.6) |
−28.9 (118.2) |
||||
| CuZnSOD | 143.3 (98.4) |
−50.2 (177.6) |
||||
| Observations | 60 | 60 | 60 | 60 | 60 | 60 |
| Log likelihood | −306.7 | −312.9 | −298.1 | −288.0 | −300.4 | −274.3 |
| Akaike Inf. Crit. | 625.4 | 635.8 | 610.1 | 594.0 | 612.7 | 606.5 |
Coefficients of the generalized linear models (GLM) are presented and in parenthesis standard deviations are shown taking PPD as target to build the models. AIC is also presented for each model tested
Significance levels: * p < 0.1; ** p < 0.05; *** p < 0.01
aROS—scavenging enzymes