For Real-time quantitative reverse transcription PCR (Real-time PCR) analyses, the first-strand cDNA was synthesized using TransScript® First-Strand cDNA Synthesis SuperMix (TransGen Biotech, Beijing, China). Real-time PCR was performed using SYBR Green Mix (TIANGEN, Beijing, China) in a LightCycler96 instrument (Roche, Switzerland), with the maize GAPDH gene as the internal reference. The ABA signaling pathway genes ZmSnRK2.4, ZmPP2C-A4, ZmPP2C-A7, ZmRD17, ZmRAB18, and ZmLEA were selected for expression validation using specific primers [25 (link)].
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