Fig. 3

Ustiloxin B production by A. oryzae transformants with promoters P1 to P6 fused to ustR in (a) solid maize medium for 14 days, b V8 liquid medium for up to 10 days, and c PDB liquid medium for up to 20 days. The error bars represent the standard errors of the three replicates. The error bars of P1 are drawn in dashed line in b, c to distinguish them from others. In a, *p < 0.05, **p < 0.01 by paired t-test against the control pyrG revertant