The expression of PatL, encoding the putative transcription factor
of patulin biosynthesis cluster (Li et al., 2015), was analyzed in
P. expansum T01 under different C, N and pH conditions using RT-qPCR.
Under C sources which favored patulin production, such as glucose, sucrose
and maltose, the expression level of PatL was up-regulated. In
Fig. 2.