Total RNA was extracted from the collected plant material using NucleoSpin RNA II kit (MachereyNagel, Düren, Germany). Real-Time RT-PCR was carried out as a two-step procedure. Reverse transcription was performed using the qScript™ cDNA SuperMix kit (Quanta BioSciences™, Inc.,Gaithersburg, MD) according to the manufacturer’s instructions, with 304 ng of total RNA as a template in a reaction volume of 20 ll. Real-time PCR was accomplished with LightCycler 480 SYBR Green I Master (Roche, Mannheim, Germany),