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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)

From: Metabolomic, enzymatic, and histochemical analyzes of cassava roots during postharvest physiological deterioration

  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
  1. 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
  2. Significance levels: * p < 0.1; ** p < 0.05; *** p < 0.01
  3. aROS—scavenging enzymes