Variation in sugarcane biomass composition and enzymatic saccharification of leaves, internodes and roots

Table 4 Correlation of cell wall component vs. xylose released from the cell wall during enzymatic saccharification

Saccharified sugar	Biomass component	vs. Sugarcane tissue component	Pearson correlation	Significance (2-tailed)	R² (regression)	Slope (b1)	Significance (regression)
% Xylose released	Cell wall	Cellulose	0.01	0.9	0.00	0.04	0.94
		Hemicellulose	0.18	0.3	0.00	0.13	0.85
		Lignin	− 0.65	0.00	0.42	− 1.9	0.00
	Hemicellulose	Mixed-linked Glucan	0.35	0.04	0.12	0.25	0.04
		Xylose	0.11	0.53	0.01	− 0.07	0.53
		Arabinose	− 0.57	0.00	0.33	− 0.17	0.00
		Galactose	− 0.5	0.002	0.25	− 0.16	0.00
	Lignin	Guaiacol	0.13	0.45	0.02	0.02	0.45
		Ethyl-2-phenol	0.41	0.01	0.17	0.03	0.01
		Creosol	− 0.26	0.124	0.07	− 0.01	0.12
		4-Ethyl guaiacol	0.29	0.091	0.08	0.02	0.09
		4-Vinyl guaiacol	− 0.39	0.02	0.16	− 0.2	0.02
		Syringol	0.32	0.06	0.1	0.09	0.06
		Isovanillin	0.11	0.5	0.01	0.01	0.5
		Isovanillic acid	0.34	0.04	0.12	0.11	0.04
		Isoeugenol	− 0.38	0.02	0.14	− 0.05	0.02
		Methoxy-eugenol	− 0.03	0.85	0.00	− 0.02	0.85
		p-Coumaric acid	0.23	0.17	0.01	0.13	0.56
		Ferulic acid	− 0.13	0.44	0.02	− 0.01	0.38
		AIL	− 0.55	0.00	0.45	− 1.61	0.00
		ASL	− 0.7	0.00	0.36	− 0.45	0.00
		S/G ratio	0.09	0.62	0.00	0.00	0.77
	Other analyses	FA/Ara ratio	0.27	0.11	0.18	0.00	0.01
	Other analyses	Cont. of glucan	0.3	0.08	0.09	0.00	0.08

All tissues from both genotypes included in the analysis (N = 36). Values compared are presented in Fig. 3. S/G ratio stands for the ratio of syringyl and guaiacyl lignin species, FA/Ara ratio is the ratio of ferulic acid and arabinose in each sample, and cont. of glucan describes the content of glucan/(lignin + xylan), as described in [38, 39] and [33], respectively. Italic rows display components with a significant |Pearson correlation value|≥ 0.3 and p ≤ 0.05

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