Fig. 3
Solid-state NMR analysis of onion primary cell walls. a Spectral deconvolution of 1D 13C conventional CP spectrum that mainly detects rigid components. The experimental data is in black and the fitted line is in orange. Underlying Lorentzians are individual fitted components. b Spectral deconvolution of quantitative MultiCP spectrum that detects all molecules. c Expanded region of 52–95 ppm region of MultiCP spectrum. d Polymer composition from integrated ssNMR MultiCP spectra. Spectral deconvolution yields both polysaccharide to lipid ratio and sugar composition analysis. i (interior cellulose), s (surface cellulose), GA (GalA/GlcA), Gal (galactose), A (arabinose), R (rhamnose), GAMe (GalA/GlcA methylated), AcMe (acetylated methyl group), Lipid CO (carbon/oxygen), and XyG (xyloglucan). Following number refers to the associated 13C site number