Table 1.
Expression profiles of maize genes in family subgroups of cell-wall-related functions.
| Cell Wall function | Number of Genes (Number expresssed)1 |
Elongation | Transitional | Secondary |
|---|---|---|---|---|
| Sucrose Synthases | 8(8) | 4 | 3 | 1 |
| Nucleotide sugar interconversion | 46(39) | 12 | 8 | 12 |
| Nucleotide sugar transporters | 65(58) | 20 | 15 | 15 |
| Cellulose synthases (CesAs) | 20(19) | 6 | 5 | 6 |
| GAX synthesis | ||||
| GT8A (GUX) | 7(6) | 2 | 2 | 0 |
| GT8C (GATL) | 10(7) | 3 | 2 | 1 |
| GT43 | 16(14) | 0 | 6 | 6 |
| GT47E | 11(10) | 4 | 1 | 4 |
| GT61 | 33(22) | 7 | 3 | 6 |
| XyG synthesis | ||||
| CslC | 8(6) | 6 | 0 | 0 |
| GT34 (XXT) | 18(6) | 3 | 0 | 0 |
| GT37 (FUT) | 17(4) | 1 | 0 | 1 |
| GT47A | 23(5) | 3 | 1 | 0 |
| (Gluco)mannan synthesis | ||||
| CslA | 10(10) | 8 | 1 | 0 |
| GT106B (MSR) | 6(6) | 6 | 0 | 0 |
| Mixed-linkage β-glucan synthesis | ||||
| CslF | 9(7) | 4 | 0 | 1 |
| AGP/N-Glyc/HRGP-like | ||||
| AGP/Fasciclin | 10(7) | 3 | 0 | 2 |
| GT31 | 40(34) | 18 | 6 | 3 |
| GT77 | 23(12) | 4 | 1 | 1 |
| ER/Golgi resident | 41(37) | 27 | 4 | 1 |
| Pectin Synthesis | ||||
| GT8D (GAUT) | 23(23) | 16 | 3 | 2 |
| GT106A(RRT), GT106C(PAGR), and D | 16(13) | 6 | 3 | 1 |
| GT47B | 9(8) | 6 | 2 | 0 |
| Polygalacturonases | 47(19) | 8 | 3 | 1 |
| Acetyl-transferases (TBL/BAHD) | 77(59) | 20 | 13 | 6 |
| GPI-anchored proteins (COB/SKU) | 22(15) | 9 | 1 | 1 |
| Expansins/XTHs | 87(41) | 23 | 4 | 4 |
| Monolignol Synthesis | 100(71) | 17 | 7 | 30 |
| Peroxidases/Laccases | 148(67) | 26 | 7 | 15 |
1Total expression ≥95 reads per 20 M; expression ratios calculated for those with ≥500 reads per 20 M.
Ratio of transcripts from rind tissue of internodes 4–5 (secondary): internodes 6 and 8 (elongation) for genes expressed at ≥500 reads per 20 M were classified as elongation (≤1.04), transitional (1.05–1.94), and secondary (≥1.95) expression. A complete collection of the genes we annotated, including potential Arabidopsis orthologs is given in Table S1 .