Figure 9.
MYB51 and MYB122 Are Essential for I3G and 4MI3G Biosynthesis in Response to B. cinerea and Activation of MPK3/MPK6 Cascades.
(A) Steady state levels of I3G (upper panel) and 4MI3G (lower panel) in 12-d-old Col-0, myb51, myb122, and myb51 myb122 single/double mutant seedlings after B. cinerea (Bc) inoculation.
(B) Steady state levels of I3G (upper panel) and 4MI3G (lower panel) in 12-d-old DD, DD myb51, DD myb122, and DD myb51 myb122 seedlings after DEX treatment. Samples were collected at indicated times, and IGS levels were determined by HPLC assay. Error bars indicate sd (n = 3). Differences in IGS contents between different genotypes were analyzed by two-way ANOVA. Different lowercase letters above the columns indicate statistically different groups (P < 0.01).