Skip to main content

Table 2 Phenolic acids released from sugar cane after 72 h hydrolysis

From: Effects of enzymatic removal of plant cell wall acylation (acetylation, p-coumaroylation, and feruloylation) on accessibility of cellulose and xylan in natural (non-pretreated) sugar cane fractions

Fraction

Enzyme mix

RC

 

H58

 

pCA

FA

pCA

FA

% of pCA ester

% of FA ester

% of pCA ester

% of FA ester

Pith

Background (substrate only)

0.1

<0.1

<0.1

<0.1

 

C-X

1.5 ± 0.0

1.0 ± 0.3

1.0 ± 0.3

1.5 ± 1.1

 

C-X-AnFaeA

1.4 ± 0.3

18.3 ± 0.8

1.0 ± 0.0

46.8 ± 11.9

 

C-X-TsFaeC

6.7 ± 0.4

20.9 ± 0.7

5.5 ± 0.5

48.6 ± 9.9

 

C-X-NcFaeD

1.5 ± 0.1

2.2 ± 0.5

1.1 ± 0.2

7.0 ± 4.8

Interface

Background (substrate only)

0.3

<0.1

0.3

<0.1

 

C-X

1.9 ± 0.2

0.1 ± 0.2

1.6 ± 0.3

1.7 ± 0.7

 

C-X-AnFaeA

1.6 ± 0.1

9.7 ± 0.4

1.8 ± 0.2

34.3 ± 4.2

 

C-X-TsFaeC

8.8 ± 0.1

13.4 ± 0.1

8.7 ± 0.4

34.0 ± 3.6

 

C-X-NcFaeD

2.0 ± 0.1

1.9 ± 0.2

1.7 ± 0.1

4.1 ± 0.5

  1. The release of phenolic acids (ferulic acid, FA, and p-coumaric acid, pCA) is expressed as percentage of phenolic acids in ester form, as the hydrolysis conditions are too mild to cleave ether linkages. The values significantly different from the amount released by the C-X mixture are marked in bold (t-test; P < 0.01).