A novel and efficient fungal delignification strategy based on versatile peroxidase for lignocellulose bioconversion

Table 1 Relative peak areas (%) of lignin-derived compounds identified by analytical pyrolysis

Label	Compound	Origin	Peak area (%)
Label	Compound	Origin	Corn stover	Fungal-treated corn stover
1	Phenol	H	0.7 ± 0.0	1.1 ± 0.2
2	2-Methylphenol	H	0.6 ± 0.1	ND
3	4-Methylphenol	H	0.6 ± 0.0	0.3 ± 0.1
4	Guaiacol	G	4.1 ± 0.2	2.1 ± 0.1
5	2,4-Dimethylphenol	H	0.1 ± 0.0	ND
6	4-Ethylphenol	H	0.6 ± 0.1	0.6 ± 0.0
7	4-Methylguaiacol	G	1.0 ± 0.1	ND
8	Benzofuran, 2,3-dihydro-	G	3.6 ± 0.1	2.5 ± 0.1
9	4-Ethylguaiacol	G	1.6 ± 0.1	ND
10	4-Methylguaiacol	G	0.6 ± 0.0	0.4 ± 0.0
11	4-Vinylguaiacol	G	4.9 ± 0.1	1.8 ± 0.1
12	4-Hydroxybenzaldehyde	H	0.7 ± 0.1	ND
13	4-(2-Propenyl)phenol	H	0.4 ± 0.0	ND
14	Syringol	S	4.4 ± 0.1	2.8 ± 0.1
15	4-Hydroxy-3-methoxybenzyl alcohol	G	0.7 ± 0.0	ND
16	2-Methoxy-5-propenyl-Phenol	G	0.2 ± 0.0	0.4 ± 0.0
17	Vanillin	G	0.5 ± 0.0	0.8 ± 0.1
18	4-Allylguaiacol	G	0.4 ± 0.0	0.2 ± 0.0
19	4-Hydroxy-3-methoxy-Benzoic acid	G	1.6 ± 0.0	1.0 ± 0.1
20	(4-Hydroxy-3-methoxyphenyl)acetone	G	0.3 ± 0.0	0.3 ± 0.0
21	1,2,3-Trimethoxy-5-methylbenzene	S	1.8 ± 0.1	ND
22	Homovanillyl alcohol	G	0.7 ± 0.0	0.2 ± 0.0
23	3,5-Dimethoxyacetophenone	S	1.9 ± 0.1	ND
24	4-Allylsyringol	S	0.3 ± 0.0	0.1 ± 0.0
25	4-Allylsyringol	S	0.3 ± 0.1	0.1 ± 0.0
26	Syringaldehyde	S	0.3 ± 0.0	0.3 ± 0.0
27	4-Allylsyringol	S	1.0 ± 0.1	0.2 ± 0.1
28	Acetosyringone	S	0.6 ± 0.0	0.5 ± 0.0
29	3,5-Dimethoxy-4-hydroxyphenylacetic acid	S	0.4 ± 0.0	0.4 ± 0.0
30	3,5-Dimethoxy-4-hydroxycinnamaldehyde	S	0.1 ± 0.0	ND
Total peak areas of H			3.6 ± 0.1	2.0 ± 0.1
Total peak areas of G			20.2 ± 1.5	9.6 ± 0.9
Total peak areas of S			11.0 ± 0.3	4.4 ± 0.2

S syringyl type lignin derivatives, G guaiacyl type lignin derivatives, H p-hydroxy phenylpropane

ISSN: 2731-3654