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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