library_construction_protocol: Total RNA was extracted using Qiagen RNAeasy mini kit. The quality of total RNA was analyzed by the Agilent 2100 bioanalyzer with the RNA 6000 Nano LabChip kit. RNA-seq libraries were prepared using Illumina® TruSeq RNA Library Prep Kit v2 and were sequenced using Illumina® Hiseq2500 to obtain 150-bp paired-end reads.