关键词: 被子植物, 表观遗传, 染色质重塑, miRNA, 开花时间, 花器官发育

Abstract: The floral transition is a critical developmental process in angiosperms life cycle. Plants integrate multiple endogenous and environmental signals through gene expression pattern changes to result in flowering. Over the past few decades，extensive molecular genetic studies have elucidated the molecular mechanisms governing the floral transition. One key molecular mechanism for this transition involves epigenetic modifications that affect a number of aspects of plant growth and development. Epigenetic control is determinative in plants for coordinating the switch to flowering under favorable internal and external conditions and achieving reproductive success. In this review，research progress on the epigenetic regulation associated with flowering time and floral organ development. These epigenetic modifications include chromatin remodeling，histone methylation，and the miRNAs that mediate epigenetic modifications.

Key words: angiosperms, epigenetic, chromatin remodeling, miRNAs, flowering time, floral organ development