Carbohydrate analysis of total mucilage extracted with water. A, Overview of the total mucilage extraction, which removes all polysaccharides from the seed surface that can be stained with RR. B and C, Monosaccharide composition of total mucilage extracted from seeds. Data show means + sd of four biological replicates per genotype. Significant changes from the wild type and between mutants are indicated by different red letters (Student’s t test, P < 0.05). The monosaccharide composition of the lines shown in B is provided in Supplemental Table S2, along with the data for gaut11-4, gaut10-1, and gaut14-1 mutants. D and E, Monosaccharide composition of the alcohol-insoluble residue (AIR) isolated from total mucilage extracts, following EDTA pretreatment, and the remaining seeds. Data show means + sd of three biological replicates. Asterisks indicate significant changes relative to the wild type (Student’s t test, P < 0.05).