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Table 1 Biomass yields, dyes adsorption on switchgrass, DP of cellulose, and molecular weight of hemicellulose

From: Study of traits and recalcitrance reduction of field-grown COMT down-regulated switchgrass

  Biomass yield Cellulose accessibility (mg/g) Cellulose Hemicellulose (×103 g/mol)
Y DW (kg/m2) A O A B O/B DPn DPw PDI M w M n
Reference   24.6a 9.3a 2.65a 39 ± 4a 283 ± 12a 7.3a 18.7 ± 0.7b 10.8 ± 0.6b
Year 2 control 2.2 ± 0.2 5.4 5.4 1.02 431 ± 25 3729 ± 183 8.7 31.6 ± 3.0 21.6 ± 3.7
Year 2 transgenic 2.6 ± 0.1* 6.6* 5.0 1.35 438 ± 50 3855 ± 299 8.9 29.3 ± 1.9* 19.7 ± 2.2
Year 3 control 2.5 ± 0.1 5.3 5.5 0.98 421 ± 52 3848 ± 131 9.2 36.0 ± 1.2 23.7 ± 0.9
Year 3 transgenic 2.9 ± 0.1 6.4* 6.2 1.09 402 ± 44 3875 ± 187 9.7 32.1 ± 3.0* 21.1 ± 1.6*
  1. Y DW is the dry weight biomass yield adapted from literature [19]. The maximum adsorption capacity of orange (A O) and blue (A B), adsorption ratio of orange to blue (O/B), degree of polymerization (DP) and polydispersity index (PDI) of cellulose, and the average molecular weights of hemicellulose of COMT down-regulated switchgrass and controls. The value reported was the average of 5 biological replicates from each control group and 10 biological replicates from each transgenic group. DPn and DPw: number-average and weight-average degree of polymerization; M n and M w: number-average and weight-average molecular weights; a: Avicel PH101; b: beech wood xylan. An asterisk (*) for the bold numbers indicates a significant difference between the transgenic and control groups as determined by a Student’s t test (P < 0.05). ± is followed by standard deviation