Fig. 3From: Overexpression of PtoMYB115 improves lignocellulose recalcitrance to enhance biomass digestibility and bioethanol yield by specifically regulating lignin biosynthesis in transgenic poplar2D HSQC NMR spectral analysis of lignin structure in the PtoMYB115 transgenic lines and WT. a Lignin aromatic region is shown for PtoMYB115-KO-L5, WT, and PtoMYB115-OE-L9. Correlations from the various aromatic ring unit types are well dispersed and can be categorized as the core lignin units (S syringyl, G guaiacyl, H p-hydroxyphenyl). b The lignin side chain region is shown for PtoMYB115-KO-L5, WT, and PtoMYB115-OE-L9. The major inter-unit structural units are β-ether (β-O-4, a), phenylcoumaran (β-5, b), and resinol (β–β, c), color-coded by their indicated structuresBack to article page