Fig. 7
Quantitative relationships between wood relative density, MOE, lignin content, and saccharification efficiency. a The relationship between experimentally measured wood density and MOE. Each dot represents a replicate pool of one wildtype (red dots) or transgenic (black dots) line containing 3–5 clonally propagated plants. MOE and wood density show a positive linear relationship with a correlation coefficient of 0.57. Linear regression shows that each 0.01 increase in wood density corresponds to a 125 MPa increase in MOE. b Significance chart (p-value) shows that among the lignin properties, lignin content is the only significant effector (p < 0.01) of wood saccharification efficiency. The five highest p-values and the corresponding lignin properties are shown. c–f Wood saccharification efficiency is negatively correlated with lignin content. Scatterplots show the percentage release of glucose (c, e) and xylose (d, f) in the transgenic (black dots) and wildtype (red dots) P. trichocarpa. The wood samples were either unpretreated (c, d) or hot-water pretreated (e, f) (Methods). Each dot represents a replicate pool of one wildtype or transgenic line containing 3–5 clonally propagated plants. R2 denotes the coefficient of determination (percent variance explained by the regression)
