File:Fpls-02-00023-g005.png

English: Principal component analysis and cluster analyses of sugar contents from fractionated cell wall material. Principal component analyses of the mol% sugar values in the different fractions for each mutant. The separation based on the scores from the first two principle components is displayed, and the explained variation of these components is indicated below each graph. The loadings for the variables are included in supplementary Figure S3 in Supplementary Material. The ellipses indicate clustering of mutants based on the k-mediod algorithm. The number of clusters was estimated based on the silhouette width, i.e., the dissimilarity in sugar profiles as measured by the Euclidean distances between the profiles. Wild-type (black), and mutants affecting cellulose (irx5; red), xylan (irx9; blue), and potentially lignin (irx12; orange) are indicated in different colors.