Total RNA was extracted from rose petals by a pBIOZOL kit (BioFlux, BSC55Ml)88 (link). Genomic DNA contaminants were removed by digestion with RNase-free DNase I (Promega). Reverse transcription was performed with 1 μg total RNA using HiScript II Q Select RT SuperMix kit (Vazyme, Nanjing, China). qPCR was performed on a StepOne Real-Time PCR System (Applied Biosystems, Carlsbad, USA) and a KAPA SYBR FAST qPCR kit (Kapa Biosystems, Wilmington, MA, USA). RhUBI2 was used as an internal control86 (link).
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