2.6. Dual-luciferase reporter assay (DLR)
 A dual-luciferase reporter system was used in the transient assay, and all primers used for the following construction are listed in Supplementary Table 1. For transcription activity analysis of MaC2H2-1/2, the effector and reporter system was modified according to the previous reports (Wei et al., 2009; Pei et al., 2013). The coding sequence of MaC2H2-1 or MaC2H2-2 was inserted into the constructed pBD vector driven by the 35S promoter plus the translation enhancer V sequence as effector, and the double reporter vector includes a native GAL4-LUC or driven by 35S promoter, and an internal control REN driven by 35S promoter