Relationship between sugarcane culm and leaf biomass composition and saccharification efficiency

Table 3 Relative abundances of lignin-derived compounds released after py–GC/MS from unextracted, raw sugarcane culm and leaf tissue

Compound^a	Origin	FIJI_62	MQ239	Q124	Q208	QBN13-10020	SRA1	SRA5	FIJI_62	MQ239	Q124	Q208	QBN13-10020	SRA1	SRA5
Compound^a	Origin	Culm							Leaf
2-Methoxy-5-(1-propenyl)phenol	G	0.4	0.3	0.3	0.3	0.5	0.2	0.3	0.4	0.4	0.4	0.3	0.4	0.2	0.3
4-Ethylguaiacol	G	0.5	0.6	0.5	0.6	0.7	0.4	0.5	0.5	0.7	0.8	0.6	0.8	0.5	0.5
4-Methoxy-3-methoxymethyl phenol	G	1.5	1.3	1.6	1.3	2.0	1.2	1.6	0.8	0.8	0.8	0.5	0.9	0.4	1.4
4-Propenylguaiacol	G	1.8	1.8	1.2	1.3	1.9	1.1	1.7	1.6	1.6	1.8	1.3	1.6	0.9	1.3
4-Vinylguaiacol	G	6.4	6.5	6.1	5.0	8.4	3.8	6.3	8.3	9.7	10.1	7.9	9.3	4.0	5.3
Guaiacol	G	2.0	2.5	1.6	1.4	2.4	1.1	1.7	2.1	2.4	2.6	2.0	2.4	2.6	1.5
Isovanillin	G	0.8	0.8	0.9	0.6	1.2	0.4	0.8	0.7	0.7	0.9	0.7	1.0	0.3	0.5
4-Vinylphenol	H	9.1	6.4	12.7	9.1	13.0	5.5	10.2	6.7	5.3	6.5	4.7	6.0	2.7	4.2
4-Allylsyringol	S	5.4	5.4	7.0	6.2	8.5	4.5	6.7	3.9	2.6	2.7	2.0	3.1	2.0	2.1
Acetosyringone	S	0.7	0.8	0.2	0.8	1.2	0.6	0.9	0.7	0.7	0.2	0.6	0.8	0.1	0.6
Syringol	S	4.8	4.6	6.0	5.2	7.5	2.7	5.9	2.4	1.7	2.6	1.9	2.1	1.2	1.4
S/G ratio ± SD		1.6 ± 0.1	1.5 ± 0.1	2.1 ± 0.2	2.2 ± 0	2.0 ± 0.1	1.7 ± 0.27	2 ± 0.2	1.1 ± 0.03	0.77 ± 0.12	0.76 ± 0.18	0.81 ± 0.15	0.85 ± 0.05	0.65 ± 0.15	0.75 ± 0.13

^a4-vinylguaiacol and 4-vinylphenol were not used to estimate the ratio of syringyl (S) to guaiacyl (G) units (S/G ratio) and p-hydroxyphenyl (H) content, respectively, because they predominantly arise from ferulates and p-coumarate esters [53]

ISSN: 2731-3654