Table 2.
The R2R3-MYB members number of each clade in each species and their major functions of each clade.
| Clade | Classification in Arabidopsis | Function Annotation | At | Ib | Itf | Itb | In | Ia | Ip | Total |
|---|---|---|---|---|---|---|---|---|---|---|
| C1 | S28 | development/stomatal formation | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 14 |
| C2 | S25 | development/female gametogenesis | 7 | 5 | 5 | 3 | 8 | 6 | 11 | 45 |
| C3 | S21 | development/specialized metabolism/cell wall thickening | 8 | 5 | 6 | 5 | 5 | 5 | 4 | 38 |
| C4 | S23 | abiotic stress/salt stress | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 14 |
| C5 | S22 | abiotic stress/drought, salt, and cold stress | 4 | 9 | 8 | 8 | 8 | 8 | 10 | 55 |
| C6 | S26 | development/sperm cell formation/pollen formation | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 13 |
| C7 | S18 and S77 | development/stamen development | 7 | 2 | 4 | 4 | 4 | 3 | 3 | 27 |
| C8 | S27 | development/leaf patterning | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 7 |
| C9 | S17 | abiotic stress | 3 | 4 | 3 | 3 | 3 | 3 | 1 | 20 |
| C10 | S78 | abiotic stress/potassium stress | 3 | 4 | 1 | 2 | 1 | 1 | 2 | 14 |
| C11 | S19 and S20 | development/abiotic stress | 9 | 4 | 5 | 5 | 6 | 5 | 4 | 38 |
| C12 | S8 | secondary wall/lignin biosynthesis/abiotic stress | 6 | 5 | 6 | 6 | 6 | 6 | 0 | 35 |
| C13 | S16 | development/hypocotyl elongation | 3 | 2 | 2 | 2 | 2 | 2 | 0 | 13 |
| C14 | S32 | phenylpropanoid-derived secondary metabolites/secondary cell wall biosynthesis | 2 | 1 | 1 | 2 | 1 | 2 | 1 | 10 |
| C15 | S13 | lignin/triterpenoid/cellulose biosynthesis | 4 | 2 | 3 | 3 | 3 | 3 | 0 | 18 |
| C16 | S30 and S31 | starch biosynthesis/fructan synthesis/secondary cell wall biosynthesis | 3 | 6 | 8 | 8 | 7 | 8 | 0 | 40 |
| C17 | S3 | phenylpropanoid-derived secondary metabolites/flavonoid/lignin biosynthesis | 4 | 1 | 2 | 1 | 1 | 1 | 0 | 10 |
| C18 | S2 | abiotic stress | 3 | 5 | 5 | 5 | 4 | 5 | 1 | 28 |
| C19 | S4 | phenylpropanoid-derived secondary metabolites/proanthocyanin/lignin biosynthesis | 6 | 6 | 6 | 7 | 6 | 7 | 2 | 40 |
| C20 | S7 | phenylpropanoid-derived secondary metabolites/flavonol biosynthesis | 3 | 3 | 3 | 2 | 2 | 3 | 0 | 16 |
| C21 | NO | function unknown | 0 | 5 | 4 | 4 | 4 | 4 | 0 | 21 |
| C22 | S15 | development/root hair development | 4 | 1 | 1 | 1 | 1 | 1 | 0 | 9 |
| C23 | S44 | phenylpropanoid-derived secondary metabolites/proanthocyanin biosynthesis | 1 | 0 | 1 | 1 | 3 | 2 | 3 | 11 |
| C24 | S6 | phenylpropanoid-derived secondary metabolites/anthocyanin biosynthesis | 4 | 4 | 6 | 5 | 6 | 5 | 0 | 30 |
| C25 | S12 | glucosinolate biosynthesis | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
| C26 | NO | function unknown | 0 | 8 | 9 | 8 | 6 | 5 | 2 | 38 |
| C27 | S1 | abiotic stress/specialized metabolism | 5 | 5 | 4 | 4 | 4 | 4 | 0 | 26 |
| C28 | S33 and S46 | development/anther/pollen development | 2 | 1 | 2 | 1 | 2 | 2 | 0 | 10 |
| C29 | S14 | abiotic stress/specialized metabolism/development | 6 | 9 | 11 | 10 | 9 | 12 | 0 | 57 |
| C30 | NO | function unknown | 0 | 2 | 2 | 2 | 2 | 2 | 0 | 10 |
| C31 | S11 | abiotic stress | 4 | 5 | 3 | 3 | 4 | 4 | 0 | 23 |
| C32 | S36 | development/inflorescence development/seed germination | 1 | 3 | 3 | 3 | 3 | 3 | 0 | 16 |
| C33 | S10 | suberin biosynthesis | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
| C34 | S24 | development/lateral root development | 3 | 3 | 1 | 2 | 2 | 2 | 0 | 13 |
| C35 | S9 | development/trichome branching/cuticle formation | 2 | 2 | 2 | 2 | 1 | 2 | 0 | 11 |
| C36 | NO | function unknown | 0 | 11 | 8 | 9 | 5 | 0 | 0 | 33 |