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Table 1 Chemical composition of the sorghum feedstocks (g/g TS)

From: Improved sugar yields from biomass sorghum feedstocks: comparing low-lignin mutants and pretreatment chemistries

  Wild type Stacked mutant bmr6 mutant bmr12 mutant
Glucan 0.243 ± 0.007a 0.252 ± 0.010a 0.226 ± 0.002b 0.253 ± 0.001a
Xylan 0.144 ± 0.004b 0.150 ± 0.005b 0.135 ± 0.001c 0.163 ± 0.001a
Galactan 0.0110 ± 0.0003b 0.0112 ± 0.0005ab 0.0114 ± 0.0004ab 0.0119 ± 0.0005a
Arabinan 0.0255 ± 0.0009bc 0.0266 ± 0.0012ab 0.0246 ± 0.0003c 0.0277 ± 0.0003a
Acetyl 0.0312 ± 0.0007a 0.0227 ± 0.0003b 0.0182 ± 0.0002d 0.0200 ± 0.0002c
Soluble Klason lignin 0.0095 ± 0.0007a 0.0105 ± 0.0025a 0.0106 ± 0.0002a 0.0097 ± 0.0009a
Insoluble Klason lignin 0.103 ± 0.002a 0.0833 ± 0.0010d 0.0880 ± 0.0009c 0.0967 ± 0.0016b
Total Klason lignin 0.113 ± 0.002a 0.0939 ± 0.0030d 0.0985 ± 0.0009c 0.106 ± 0.001b
Starch 0.0313 ± 0.0015a 0.0286 ± 0.0002a 0.0229 ± 0.0013b 0.0250 ± 0.0007b
Total soluble sugars 0.153 ± 0.001c 0.158 ± 0.001b 0.169 ± 0.002a 0.124 ± 0.001d
Water extractives 0.285 ± 0.020b 0.290 ± 0.027b 0.338 ± 0.005a 0.260 ± 0.006b
Ethanol extractives 0.0327 ± 0.0008ab 0.0321 ± 0.0007b 0.0329 ± 0.0013ab 0.0342 ± 0.0002a
Protein 0.0506 0.0547 0.0543 0.0534
Mineral compounds 0.0929 ± 0.0007b 0.0881 ± 0.0022c 0.0989 ± 0.0012a 0.0931 ± 0.0028b
  1. All samples analyzed in triplicate except for starch (duplicate) and protein (singlet). Total soluble sugars = sucrose + free glucose + free fructose. The uncertainty corresponds to 95% confidence interval of the mean. For each chemical compound, sorghum feedstocks with the same letter are not significantly different with the Tukey–Kramer multiple comparison test