Total RNA was extracted by RNApure Plant Kit (CWBIO) according to the manufacturer’s protocol. cDNA was reverse-transcribed using PrimeScript RT reagent Kit with gDNA Eraser (Perfect Real Time) (TaKaRa). SYBR Premix Ex Taq II (TaKaRa) was used for qPCR on a ABI StepOne Plus real-time system (Life Technologies). qRT-PCR was performed in triplicate and data were collected and analyzed with ABI STEPONETM software version 2.1 [121 (link)]. Various gene specific signal was normalized relative to ACTIN2 gene (At3G18780) expression. The primer sequences were listed as follows:
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