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Table 3 The band frequencies and absorption intensity of various functional groups in the  Acidovorax oryzae  (Ao) and  Acidovorax citrulli  (Ac) strains

From: Differentiation in MALDI-TOF MS and FTIR spectra between two closely related species Acidovorax oryzae and Acidovorax citrulli

Functional groups

Frequency (cm-1)

Intensity

Ao (n = 10)

Ac (n = 10)

 P -value

Ao (n = 10)

Ac (n = 10)

 P -value

CH3 asymmetric stretching

2965.25 ± 0.35

2962.68 ± 0.14

***

1.14 ± 0.02

1.19 ± 0.02

*

CH2 asymmetric stretching

2930.14 ± 0.26

2927.85 ± 0.23

***

1.23 ± 0.02

1.25 ± 0.01

*

CH3 symmetric stretching

2873.22 ± 0.47

2875.97 ± 0.36

***

0.83 ± 0.01

0.89 ± 0.02

*

CH2 symmetric stretching

2853.15 ± 0.36

2855.22 ± 0.56

***

0.74 ± 0.05

0.86 ± 0.07

**

Amide I

1653.85 ± 0.21

1651.61 ± 0.14

***

2.97 ± 0.15

1.84 ± 0.25

***

Amide II

1542.53 ± 0.33

1539.82 ± 0.11

***

1.98 ± 0.25

1.57 ± 0.36

**

CH2 bending

1453.61 ± 0.43

1452.14 ± 0.14

**

0.90 ± 0.03

0.96 ± 0.02

*

COO- symmetric stretch

1394.20 ± 0.36

1397.09 ± 0.25

***

0.98 ± 0.02

0.92 ± 0.05

*

PO2- asymmetric stretching

1239.61 ± 0.12

1239.48 ± 0.19

0.12

1.01 ± 0.02

0.91 ± 0.02

*

PO2- symmetric stretching

1058.65 ± 1.78

1080.02 ± 0.56

***

1.14 ± 0.19

0.89 ± 0.08

***

  1. Data are the mean of the 10 strains. *: p < 0.05, **: p < 0.01, ***: p < 0.001.