library_construction_protocol: Samples were stored at -80 °C and then used for isolation of genomic DNA with DNeasy Plant Mini Kit (Qiagen). Bisulfite libraries were prepared with the Accel-NGS Methyl-Seq DNA Library Kit from Illumina (Cat No. 30096, Swift), and the sequencing was performed at Novogene (Hongkong, China) on a NovaSeq 6000 platform in 150-bp paired-end mode