Journal Article Plant Proteins Prunus mume Research Support, Non-U.S. Gov't Plant Growth Regulators RNA-seq Transcription Factors ATAC-seq Cell division Chromatin Co-expression analysis Cold stress Cyclins DREB2A Floral homeotic gene Floral organ development Functional verification HSFA3 High temperature treatment Lagerstroemia speciosa PmCSL Populus PsnCYCD1;1 RCI2 gene family Stamen petaloidy Transcriptome analysis Tree peony Yeast screening system cold hardening cyclin