A PrimeScript RT enzyme with a gDNA eraser (Takara, Japan) was used for cDNA synthesis. QPCR was performed on a Bio-Rad CFX96 Real Time PCR system using SYBR Premix ExTaq II (Takara, Japan). The primers in this step were listed in Supplementary Table S1. Tung Elongation Factor 1-α (EF1α) was used as the internal control (Han et al., 2012 (link)). The relative expression levels were calculated using the 2-ΔΔCT method (Livak and Schmittgen, 2001 (link)). Phytohormone levels were analyzed using the methods described by Pan et al. (2002) .
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