Total RNA isolated from the SZ of stage S6 cm to S9 cm treated with 0 or 50 μM MeJA (Bioduly, Nanjing, China) for 48 h. The cDNA was prepared using a HiScript II kit 117 (Vazyme, Nanjing, China). Quantitative RT-qPCR reactions were conducted using ChamQ Universal SYBR qPCR Master Mix (Vazyme, Nanjing, China) following the manufacturer’s protocol. Primers for the genes were designed using Primer express 3.0 software (Table S6). Gene expression levels were normalized using the reference gene 18S [5 (link)], and values were calculated using the 2−ΔΔCt method [70 (link),71 (link)]. Expression values were obtained from three biological experiments. SPSS 17.0 statistical software was used to determine statistical significance.
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