Fig. 3: Cotransformation of PyWRKY31/PyWRKY26 with its partners induced anthocyanin biosynthesis, as shown by transient expression assays in tobacco leaves.

a The appearance of tobacco leaves 5 d after injection: a, pSAK277; b, PyMYB10; c, PyMYB114; d, PybHLH3; e, PyWRKY31; f, PyWRKY26; g, PyMYB10 + PybHLH3; h, PyMYB114 + PybHLH3; i, PyMYB114 + PyWRKY31; j, PyMYB114 + PyWRKY26; k, PyMYB10 + PyMYB114 + PybHLH3; l, PyMYB114 + PybHLH3 + PyWRKY31; m, PyMYB114 + PybHLH3 + PyWRKY26; n, PyMYB10 + PyMYB114 + PybHLH3 + PyWRKY31; o, PyMYB10 + PyMYB114 + PybHLH3 + PyWRKY26. b Differences in color are shown with the values of L*, a*, and b*. Significant differences are indicated at the level of P < 0.05 with lowercase letters. Highly significant differences are shown at the level of P < 0.01 with uppercase letters. Error bars are shown for six biological replicates. c Determination of the total anthocyanin contents in tobacco leaves with induced coloration